Gravitation ONE SHOT | Class 9 Science Chapter 9 | NCERT + PYQs | Samridhi Sharma

Hi, hello, hi, Namaste. How are you, ma'am? How are both of us? In a bad state, because we tried to study the chapter on gravitation in school, but didn't understand anything. So, don't take any stress and tension at all, because you have arrived, my dear, on Samriddhi Pukhi Ma'am's channel. And here, my dear, we discuss all the concepts very well. And in today's session, we are discussing a very important chapter of Class 9 Science, which is named Gravitation. And many children are afraid of this chapter. I don't know why. I'll tell you. Because the length of this chapter is very long, because it has many topics, and children are completely troubled, thinking, "Ma'am, should we read the theory? If we understand the theory, then later we can do some numericals." So, there is a lot of confusion. Look, the best way to study physics is that first you should have a clear understanding of the theory concepts. When your concepts are clear, the numericals will be solved automatically. But numericals will only be solved, my dear, when we practice a lot. Right? So, today's session will cover both theory as well as numericals. Before studying this particular chapter, my dear, please make sure you have studied the chapters Motion and Force and Laws of Motion well, because in this chapter, my dear, the concepts related to both of these chapters will be applied. You will find the playlist on my channel. We have covered both chapters there. So, let's finish the chapter on Gravitation today. The PDF notes of whatever we will study today will be available on my Telegram channel. The link will be given below. Now, enough talk. Let's talk about work. The work is, what is in this particular chapter? There are many topics. For example, the very first topic is our Universal Law of Gravitation. Then we will talk about Acceleration Due to Gravity, Free Fall, the concept of Mass and Weight, Thrust and Pressure, Buoyancy and Archimedes' Principle. Right? Now, my dear, let's start with a very basic point. What is the basic point? Universal Law of Gravitation. No, my dear. Okay, my dear, let's talk about the name of the chapter. What is the name of the chapter? The name of the chapter is Gravitation. And whenever this word, Gravitation, is spoken, only one thing comes to our mind. Newton's apple, which fell down. Oh, my dear, what are you waiting for the apple? Look at this, my dear. If I throw this pen upwards. I threw it up. But why is it coming down, ma'am? Because the Earth is applying a gravitational force on it, due to which it is being pulled towards it. Very good. And Samriddhi Ma'am jumped. Oh, why did Samriddhi Ma'am go down? Why isn't she going up, ma'am? Because what did the Earth do? The Earth applied a force on you, due to which you are going down towards the Earth. Gravity, gravitational force. Okay, let's do one thing. Phone. Ha ha ha. No, no, my dear. Don't be so smart. Why would I throw a phone? Right? Why would I throw a phone? I'll throw a bottle. Right? My dear, if I don't throw this bottle and just leave it from my hand. Where will it go, my dear? It will go down. Why? Because, ma'am, the Earth is applying a gravitational force on this bottle. So, this much is understood. We live on this Earth, and talk about any human living on this Earth, any non-living object, any object, any body. If we, if we, my dear, leave it like this or throw it up, why does it always go downwards? Because, ma'am, the Earth applies a force on every object, on every body. The name of that force is gravitational force. If I tell you that this is true, but incomplete, how will you feel? Ma'am, a little disappointed, but no problem, you teach. Today we will understand, and this mindset is very important, right? A mind should be open. When you come to any lecture, my dear, please make sure you come with a positive mindset, thinking, "If I haven't understood something yet, today I will watch this lecture with full concentration, full focus, and I will understand it today." Right? So, with this positive mindset, let's move forward. My dear, I said, I said that, my dear, any object, right? Any object, my dear, right? Any ball, any ball, it is going down, right? Any fruit, my dear. It breaks from the tree and goes down. Or, suppose, my dear, you went skydiving. My dear, you are also going down. Why is everything going down? Ma'am, that's what we just discussed. Gravitational force. Ma'am, the Earth pulls every object downwards by applying gravitational force. What is gravitational force? Let me tell you today. Look, my dear. Okay, okay. Let's see first. What is gravitational force? Gravitational force is a force that every two objects apply on each other. Two objects. Now, we have only read this, right? We have only read this. The Earth's gravitational force exists. Or, ma'am, at most, look, we have read it like this. Right? We have read it like this, that, my dear, the Sun's gravitational force exists. The gravitational force of different planets exists. Right? And they all revolve around them like this. Ma'am, what are you saying? Where did these two objects come from? We have always read that the Moon has a gravitational force, the Earth has a gravitational force, the Sun has a gravitational force. Ma'am, we can only relate gravitation to this. We don't know the concept of these two objects. Let me tell you now. My dear, first of all, tell me, do you remember the Third Law of Motion? Yes, ma'am, we remember the Third Law of Motion. What did the Third Law of Motion say? The Third Law of Motion said, "To every action, there is an equal and opposite reaction." We remember this, ma'am. Let's remember the Third Law of Motion in a slightly different way. What does the Third Law of Motion say? The Third Law of Motion says that if one object applies a force on another object, then the second object doesn't just sit there. It also applies an equal and opposite force. Remember? Remember it, my dear. Remember it? We remember it, ma'am. Right? So, according to this logic, according to this logic, tell me now, my dear, if, if I, my dear, threw this pen upwards. This pen came down. Why? Because, ma'am, the Earth applied a gravitational force on this pen and pulled it towards itself. So, my dear, tell me one thing. If the Earth is applying a force on it, then it must also be applying a force on the Earth. That's what it says, right? Third Law of Motion. Yes, ma'am, that's true. Repeat it, ma'am. Repeat it. I'll repeat it again, my dear. The Third Law of Motion says that when any one body, any one object, applies a force on another object, then the second object doesn't just sit there. The second object, that second body, also applies an equal and opposite force on that object, on that first object. We learned this in the Third Law of Motion. So, apply this logic here, my dear. Apply this logic here. My dear, if I am throwing this pen upwards, why is this pen being pulled down? Because the Earth applied its gravitational force on this pen and pulled it towards itself. So, my dear, tell me one thing. This pen must have also applied some force on the Earth. Exactly, the Third Law of Motion. And let me tell you one thing. This is where, my dear, inspired by this Third Law of Motion, Sir Newton gave the Universal Law of Gravitation. What did he give, my dear? He gave the Universal Law of Gravitation. The Universal Law of Gravitation is also called Newton's Fourth Law. Okay? And what does it say? What does it say? It says, first of all, what did it say? It said, "Look, in our entire universe, in the entire cosmos, any two objects, any two bodies, apply a force on each other." That force is an attractive force. And that force is equal. Still, many children must be thinking, "Ma'am, what did you say? It went over my head. What happened?" Listen carefully. What is gravitational force? Gravitational force is a force of attraction. What is gravitational force? What is gravitational force? Gravitational force is an attractive force. It is a force of attraction. That two bodies apply on each other. That two bodies apply on each other. So, if the Earth is pulling this pen towards itself by applying a force, then, my dear, remember, this pen is also applying a force on the Earth. Obviously, its mass is very small. Right? So, so that, "Why isn't the Earth coming towards us?" So, we will discuss all these things later. But accept this, my dear. Accept this from today. If the Earth applies a force on us, then we also apply a force on the Earth. So, when I jumped and went down, it was because the Earth pulled me towards itself by applying a force. So, my body must have also applied a force on the Earth. Similarly, my dear, any two objects, any two objects in the universe, any two bodies in the universe that have some mass. They are applying a force on each other. We can't see it, but yes, a force is being applied. For example, the Earth is applying a force on the Moon, so the Moon is applying a force on the Earth. Right? If the Sun is applying a force on the Earth, then the Earth is applying a force on the Sun. Okay? If this pen and this phone are lying on a table, my dear, then let me tell you, my dear, this pen is attracting this phone towards itself. And this phone is attracting this pen towards itself. Gravitational force is a force that we call an attractive force. It is a force of attraction. So, what happens in gravitational force? Two objects, two bodies, any two bodies in the universe apply a force of attraction on each other. And that force, that force, my dear, is equal and opposite. If I tell you that this pen is pulling this phone towards itself with a force of 10 Newtons, then the phone is also pulling this pen towards itself with a force of 10 Newtons. This is it. This is the concept of gravitational force. Pick up any two random things, my dear. Each and every thing is exerting gravitational force. There must be many things in this room. For example, you are studying sitting at a table, my dear. Right? There must be many things on it. Every two things, every two objects are applying equal and opposite forces on each other. And by applying that equal and opposite force, they are pulling each other towards themselves. And this is the force of gravitation. Okay, my dear? So, you know, my dear, the force of gravitation. Due to the force of gravitation, the apple went downwards. Because it is gravity, right? The Earth pulled the apple towards itself by applying gravitational force. But if only someone had told us that the apple also applied a force towards the Earth. Okay? So, we learned the concept of gravitational force from here. We will discuss everything one by one. But first, let's talk about the Universal Law of Gravitation. First, let's talk about the Universal Law of Gravitation, my dear. So, Newton gave this, and I have already told you that it is also called Newton's Fourth Law. Now, what did he say in it? My dear, its statement is very important. Right? Its formula can be directly asked for derivation. And after that, a follow-up question is asked. Okay? Let's see first, my dear. What did Newton say? Newton said, "Newton's Law of Gravitation states that every object in the universe attracts every other object by a force F that is directly proportional to the product of their masses m1 m2 and inversely proportional to the distance between them." What did he say? Didn't understand anything, ma'am. If we knew so much English, then by now, ma'am, where would we be? No worries, my dear. Understand. So, Newton said that, my dear, Newton said that pick any two objects in the universe. Right? Which have some mass. Let's say one object is m1. Right? He said that pick any two objects in the universe. What is the mass of one? Let's say m1. So, let's make something here. Let's say we made this here. We made this object. Let's assume its mass is m1. And let's make a small object. Right? Let's make a small object. And let's assume its mass is m2. So, here we have made two objects, two bodies. One has mass m1, and the other has mass m2. So, what does the Universal Law of Gravitation say? What does the Universal Law of Gravitation say? I will say it three times. The Universal Law of Gravitation says, pick any two objects in the universe. Those two objects are pulling each other towards themselves. And the force with which they are pulling each other is equal and opposite. Meaning, this body, this object is pulling this object towards itself. Right? And this object is pulling it towards itself. And the force they are applying on each other is what? It is equal. It is equal. Equal and opposite. Meaning, if it applied 10 Newtons, then it also applied 10 Newtons. If it applied 100 Newtons, then it also applied 100 Newtons. Remember this. Okay? And from here, my dear, we learn the Universal Law of Gravitation further. Now, my dear, the Universal Law of Gravitation has told us that two objects are applying force on each other and pulling each other towards themselves. Now, how much is that force? How much will that force be? This depends on two things. How much will that force be, my dear? How much will that force be, my dear? This depends on two things. The first point, my dear, is what? The first point is that the force acting between them is equal to the product of their masses. Not equal, sorry, proportional. Directly proportional. Meaning, the force they are applying on each other, right, my dear? It is pulling it towards itself, and it is pulling it towards itself. And with the force, my dear, right? With the force with which these two are pulling each other towards themselves. Let's say we call that force F. Let's call that force, my dear, F. So, it says that this F force, this F force, that both are applying on each other, right? This F force, that both are applying on each other, that force, that force is directly proportional to both masses. Meaning, if the mass of these two is more, then the force acting between them is also more. And if the mass of these two is less, then the force acting between them is also less. Okay? This is what directly proportional means. The second thing, my dear, Newton said is that the force acting between them also depends on the distance between them. So, let's say this is one object. This is its center. And this is its center. So, my dear, the distance between the two, our NCERT has given it as D. We can also write it as R. Right? D is given in our NCERT. We can also write it as R. Sometimes it is R, sometimes it is D. Don't get confused. Okay? So, let's say this is one object. This is one object. Its mass is M1. Its mass is M2. And let's say the distance between them is d or r. So, Newton said that the force acting between them is inversely proportional to the square of their distance. Meaning, take the square of the distance between them. Take its square. Right? So, what does this mean? What does inversely mean? That, my dear, the closer these objects are. The closer these objects are, the more force they will apply on each other. So, let's say this is one object. This is one object. The closer these two objects are, the more force will be between them. But as I move these two objects further away from each other, the gravitational force acting between them will decrease. This is what inversely proportional means. This is what inversely proportional means, my dear. If the value of r is more, then the force between the two will be less. Okay? Do the opposite. If the value of r is less, then the force between them is more. Is this understood, my dear? So, from here, we will re-read the statement of the Universal Law of Gravitation, my dear. We will re-read it. Newton said that any two objects in the universe, any two bodies in the universe, apply equal and opposite forces on each other. Now, what will be the value of that force? Right? My dear, is that force 10 Newtons, 20 Newtons, 50 Newtons, 100 Newtons, 1000 Newtons, 1 lakh Newtons? My dear, what will be the value of that force? The value of that force depends on how much mass those two objects have. The more the mass, the more the force. And besides that, it also depends on how far apart those two objects are from each other. It also depends on how far apart those two objects are from each other. So, we have mentioned these two points here. And by combining them collectively, it is written like this, that the force acting between them, the force acting between them, is directly proportional to m1 m2. We have taken the product of both masses. We have taken the product of both masses. If, let's say, its mass is 10 kg and its mass is 2 kg, then the product of these two will be, my dear, m1 m2 means, look, look, this will be m1, which is 10 kg, and this is two. So, the product of masses, what will I take? 20. Right? So, the product of masses means, take its mass, take its mass, multiply them. And, my dear, inversely proportional to what is below?

Son, we have taken the square of the distance of both. We have taken the square of the distance between the two. Okay. The closer they are, the more force they will exert to pull each other towards themselves. The farther apart they get, the less the force between them will be. These two things were said by Mr. Newton in our Universal Law of Gravitation. Now, son, we also know this. Okay, see, this has come out, what was written before. See, this has become ours, right? This has become ours. Now, son, if you have studied this in school, then you will know that there is some big, some mathematical, some formula. In which capital G, I don't know how it came. I will tell you, son, what to do next. See, son, it's a simple thing. Right? What do we do, son? When we remove this proportionality sign, we have to take a constant. So, similarly, son, when we remove this proportionality sign here, when we do what here, son? Remove the proportionality sign, then what will happen? What will happen? So, son, a constant will be taken here. Right? Here, by removing the proportionality sign, what will we do? We will put a constant. And son, we call that constant the gravitational constant. We call that constant the gravitational constant. And here I have written a big capital G. We denote the gravitational constant by capital G. And the rest of the things will remain the same. This is m1 m2. The product of the masses of both, and the square of the distance between them. From here, son, our formula has come. Well, what is this formula for? Well, if you want to find the value of this f, how much force these two are exerting on each other. The first thing is that both are exerting equal force on each other. Well, if it is pulling it towards itself with a force of 10 Newtons, then it will also exert a force of 10 Newtons. Remember this, son. Remember this. And this gives a logic, you know, that whatever force the Earth is exerting on me right now, see, son, I went down. Right? So why did I go down? Because the Earth exerted a force on me. But I would like to tell you, friends, the force that the Earth exerted on me, I must have exerted the same force. This is what the Law of Gravitation is teaching us. So remember this, son, the force is equal. Remember this, the force is equal. But ma'am, if we want to find its value? If we want to find its value, then this formula has come, man. This formula has come. You need to know the mass of both objects. You need to know the distance between both objects. And ma'am, this G, son, this is a constant. It has a value. Right? It has a value, man, what is its value? See, its value is 6.673 * 10 raised to the power -1 Newton meter square plus kg square. Oh man, I'm getting dizzy. Ma'am, listen, listen, listen, listen, listen. Slowly, slowly, no problem, no rush. Oh man, see, take an extra 15-20 minutes, no problem. You will learn the concept, this is my guarantee. Okay, son? Start focusing on quality. In the ninth grade, strengthen your topics so much that you don't have difficulty in tenth and eleventh. The biggest difficulty, son, is here for children. They take ninth grade lightly. They don't learn concepts in ninth grade. They think we'll watch short videos, half-hour ones. Son, studying doesn't happen like this. If you want to achieve something in life, you have to give time. Okay? So learn, learn. Okay, son? See. So here, here, son, what is this G? What is this G? What is this? G? G is the gravitational constant. Okay? G is the universal gravitational constant. Oh, what happened? It seems to have hung up listening to our conversation. Okay? What is G, son? G is the universal universal gravitational constant. It is the universal gravitational constant, son. And its value is fixed. Its value, son, was found by Mr. Henry Cavendish. Okay? And what is its value? 6.673. Remember 6.67. That's enough. * 10 raised to the power -1 Newton meter square plus kg square. Man, how did this value come? How it didn't come? You don't need to know all this right now. Just remember this much. Its value is this, and its SI unit is this. How it came, I will tell you. Okay? Understood, son? And this value will never change. You are standing on Earth, its value will be this. You go to the moon. You go to Mars. You go to Saturn. You go to the Sun. You go anywhere, son. Go anywhere in the entire universe. Its value will be the same. This value will remain the same. And because of this constant, son, a lot is happening. Right? Satellites, etc., are sent, right? This value is used there. Okay? So this is a very important value. Understood this? Okay, now I said, okay? Now I said that we will see where the SI unit of this universal gravitational constant came from. Understood this. Mr. Henry Cavendish told people its value in 1798. Now, what is its SI unit? Newton meter square plus kg square. Right? So first of all, where did it come from? Many times it is asked in exams, or there is an MCQ. They will give many options and ask, tell me, what is the SI unit of the universal gravitational constant? So, see how this SI unit came. We know, son, we know the formula, tell me quickly. We know the formula, which formula, ma'am? Oh, son, the universal law of gravitation, f = f = G. What else is there, son? We have taken the mass of both objects, both bodies, and the square of the distance between them. Right? We know this? Yes, ma'am, we know it. We know it. Okay, now do one thing. Now do one thing. You have to do what, son, by any means? Leave G alone here and take everything else here. What will you do? What will you do, ma'am? First of all, it is in the denominator here. We will take it here. Where will we take it? Here. So what will it become, son? Tell me quickly. What will it become? If you take it here, what will it become, ma'am? Force is already there. r squared is here. And what will remain with it? Here, ma'am, capital G will remain, and the product of both masses will remain. Which is with it, son? It's in multiplication. It's something like m1 m2, right, son? Simplify this further. Here. This thing remains, son. Right? I took it here. This remains. Can I simplify this further? Yes, ma'am? Because it is multiplied here. It is multiplied here, so if it comes here, it will go into division. Very good, son. So this is r squared, and from here m1 m2, and what remains here? Capital G. Now, son, tell me one thing. Do you know the SI unit of force, radius, radius means distance. Right? Mass? Yes, ma'am, we know. So put it, son. So put it. Right? So put it, son. Okay, let's do the SI unit of everyone, everyone, quickly. What is the SI unit of everyone, son? We will put the SI unit of everyone here, quickly tell me. What is the SI unit of force? Newton, son. r means radius, radius means distance. What is the SI unit of distance, ma'am? Meter. And meter is also, see, it's squared, so meter squared. Upon, son, one mass, mass, mass, SI unit is kg. And the SI unit of the other mass is kg. Son, tell me one thing. Can I write this as kg squared? 1 kg, 2 kg. So can I write this as kg squared? Yes, ma'am, you can. Write it, write it, write it. And what came here, son? G. So what is the SI unit of G from here? Therefore, therefore, the SI unit of G is equal to what, son? What is it? Newton, Newton meter square. Newton meter square. Can I write it like this? It's multiplied. So can I write it as Newton meter square? Tell me quickly. Yes, ma'am, you can. And son, because if I want to write it above, I can write it as per kg square. Tell me, did this come or not? This Newton meter square plus per kg square. So, son, you should know this, this, this, and many times it is asked to derive it in the exam. Okay, son? So from here, our Universal Law of Gravitation is finished. But now, if I ask some children, son, did you understand? The children will say yes, ma'am, we understood. But as soon as I ask the children this question, they get completely confused. And I said, son, today I will leave no confusion, everything will be clear. Okay, so son, it's just this much for you, but I believe if you can answer this properly, then I will assume that you have understood the concept. Okay? So my question is. Answer thoughtfully, no problem. Take your time. My question is, son. Suppose, right? There is land. Right? Suppose, son, we are standing here. Suppose we are standing in a park. In that park, son, there is a car parked. You are also standing, and there is also a ball lying on the ground. On the ground, son, you are also standing. Right? On the ground, you are also standing. On the ground, there is a car parked, and on the ground, what is there, man? A ball is also lying. Now tell me, son, now tell me thoughtfully, son, does the Earth exert the same force on all these objects? Or will you say it exerts a different force? Okay? My question is. Does the Earth exert the same force on all these bodies? True or False. True or False. Answer yourself. Answer yourself, man. Tell me. Now many children will say yes, ma'am, same force. Oh man, how is it the same force? Think, think, think. It's not the same force. Son, listen. Okay, tell me one thing. Earth, son, Earth, ground, Earth, right? Look at it like this. Look at it like this. The Earth is pulling this car towards itself with a force. So the car must also be pulling it towards itself with a force. Oh yes. And what does the force between these two depend on? Ma'am, on both their masses. If the mass of our Earth is m1, and let's assume the mass of the car is m2, then what will the force between these two depend on? On what their masses are? See, son, this is the formula. So it depends on both masses. Right? It depends on both masses. Understood this? Understood? The same thing, son, will apply here. Right? The same thing will apply. That we are standing on the ground. The Earth is pulling us towards itself with a force. So we are also pulling the Earth towards ourselves with a force. And what does the force between these two depend on? On what is the mass of the Earth, and what is our mass? Right? Similarly, son, the Earth is pulling the ball towards itself. Similarly, the ball is also pulling it towards itself. Right? And what does the force between these two depend on? On what is the mass of the Earth, and what is the mass of the ball? Son, tell me one thing, suppose, son, because everyone is standing on the ground, so the distance between the ground and that body or object is the same. Man, I am also standing on the ground, the car is also on the ground, the ball is also on the ground, so the distance is the same. Okay, the distance is the same. Okay, son? The mass of the Earth is also the same everywhere, right? m1, m1, m1. The mass of the Earth is also the same. What is varying? The mass of the car, the body, our body's mass, the ball's mass. So, son, suppose, suppose, son, the mass of the car is 1000 kg, your mass is 50 kg, and suppose, son, the mass of the ball is 1 kg. Now tell me, son, will the value of m2 * m1 * m2 be the same? Son, I am not making you memorize, son, I am teaching you to think. I am teaching you to think, son. Even good children get confused here, they can't learn the concept. Son, learn, don't memorize, understand. Now tell me, son, if you want to find the value of this force, the force between the two, what will you do? Ma'am, we will put the mass of the Earth here. We will put the mass of the car here. Very good. And multiply them. The thing below is the same. Forget it. The distance between all of them is the same. What will you do, son? You have to multiply the mass of the Earth and this. So the value, son, tell me quickly. Right? You don't know its value yet. But it's a simple thing, man. The more, the more this object's value is, the greater the product will be. Tell me quickly, man, tell me quickly, man, it's a common thing, a common thing. Think, think. You have to multiply the mass of the car and the Earth. You have to find the product. Which is 1000 kg here, 50 kg here. If you multiply 50 kg with the mass of the Earth, here what is it? Here you will multiply 1 kg with the mass of the Earth. So in which case will the value of this force be the largest? Tell me. First, tell me, will it be the same? No, ma'am. If you multiply 1000, the value will be something else. If you multiply 50, it will be something else, and if you multiply 1, it will be something else. But one thing, ma'am, we are sure of, because 1000 is the biggest, the largest value here. So the value of the force will be the largest here. Because the greater the product, the greater the force. Right? The greater the product, the greater the force. The greater the product, the greater the force. Understand, son? Okay? Understand? So in all three cases, son, where will the largest value be? In all three cases, the largest value will be here, the force. So, son, from here I will conclude my point, what I was trying to explain. Son, suppose this is a pen. It weighs 1 kg. No, but suppose, son, it is 1 kg, or look at this, son. Son, the Earth is exerting the least force on this ball in these three cases. It is exerting more on our body, which is 50 kg. And even more force, the Earth is exerting on this car, son. Because its mass is the largest. What does the Universal Law of Gravitation tell us? That two objects exert equal and opposite forces on each other. And what does the value of that force depend on? What is the mass of those two objects? The greater the mass, the greater the value of that force. We learned this from here. Right? So now, if I give you a question, if I give you a question now, what will you answer? The Earth is doing what, son? If we look at the Earth, there are many things. There is a ball with a mass of 1 kg. There is a human body with a mass of 60 kg. There is a truck with a mass of 5000 kg, and there is a car with a mass of 1 kg. On which one is the Earth exerting the most force, pulling it towards itself? It is pulling everyone, son. The Earth is pulling everything towards itself. But on which one is the force the largest? On which one is the force the largest? The one with the largest mass. Which is the truck here. And it's not that only the Earth is pulling, man. It's not like that. It's not that only the Earth is pulling. Man, that object is also pulling it towards itself. I hope from here, any small doubt you had regarding the Universal Law of Gravitation is cleared. Now, what comes in the exam is, tell me the statement of the Universal Law of Gravitation. Derive its formula and tell its applications. A three-mark question is ready. One mark for the statement. A small derivation. One mark for it, and applications are asked. You have to give two applications. I have also told you the question. Questions like this come. So what will you say? You will say that, look, we are standing. Right? It's not that we wake up in the morning and fly. We fly, my heart flies, I fly, I don't know how to stop. It's not that you are flying around. Right? You are always grounded. Right? Always, always, right? Our feet are on the ground. Nowadays, feet don't stay on the ground. It's not like that. They always stay. Why? Because constantly, man, our Earth has bound us and everything to itself. Right? You must have seen many times, son, watch some good things on YouTube. Like any space mission that went where people are in space. Accidentally watch some NASA documentary. Please watch there that the things of those who go to space now, they float in the air because there is no gravity there. Meaning, gravity has become very less. Because everything is held together by gravitation. Right? So, son, the Earth has kept us bound. Right? Because of the Earth's gravitational force, we are bound to it. Even, son, our moon, we know that the moon orbits the Earth. It is orbiting the Earth, man. Right? It is going round and round and round and round the Earth. This is also because of the gravitational force. Right? This is also because of the gravitational force. Okay? And son, the moon is orbiting us. We are orbiting the Sun. This is also because of the gravitational force because the Sun's gravitational force is attracting us. Okay? And similarly, son, we know this, you must have read this in geography too, in lower classes, you must have seen in the sea, right? Tides come. High tides, low tides. You must have read, right? Those big waves that come, why do they come? Because of the gravitational force of the moon. Right? Moon and Sun. Right? So because of this, what is happening? We see all these things. Okay? Okay, now a question comes to mind. Ma'am explained one thing to us that, man, in the world, not world, man, in the universe, any two things, any two bodies, exert force on each other and pull it towards themselves. So, ma'am, according to that, one

Tell me, you. Yes, a doubt is arising in our minds. It should arise, brother. Doubt should arise. If doubt isn't arising, then I assume you haven't understood anything. Doubt arising means your mind is functional. Your mind is working. Okay? See, child, we know that the Earth is pulling the Moon towards itself. Right? The Earth is pulling the Moon towards itself by applying a gravitational force. So, what does the Universal Law of Gravitation say, friends? It says that if one object pulls another object towards itself, then the second object won't just sit there, will it? It will also pull back, it will also pull back. So, this one is also pulling it towards itself. But, ma'am, but, ma'am, tell me one thing, how much will this force be? This force will depend on what? What is the mass of the Earth? What is the mass of the Moon? What is the distance between them? So, this can be calculated, it's not a big deal, okay? But the question here is not that. The question is, if the Earth is applying the same force on the Moon as the Moon is applying on us. Think like this: the same force that the Earth is applying, the Moon is also applying. So, why aren't we running towards the Moon? Or why aren't we orbiting the Moon? Why is the Moon orbiting us? Because, child, what is the mass of the Moon? The mass of the Moon is less. The mass of the Moon is less. Think about it like this, child. I'll give you an example. Okay? I'll give you an example. Suppose, child, there is an elephant in front of you. Elephant, my companion. Oh, that's my friend, ma'am. It has become a fat elephant. Okay? And suppose, child, there is a ball in front of you. Suppose, child, you have the ball, okay? What did you do to the ball? You applied a force of 10 Newtons to the ball. You applied a force of 10 Newtons to the ball. And you applied the same force, child, to your elephant, my companion. You gave both of them a push by applying a force of 10 Newtons. You applied a force of 10 Newtons on both. Who will move? Tell me, child. Oh, ma'am, the elephant won't move. 10 Newtons. Can you move an elephant with 10 Newtons? No. But, ma'am, a force of 10 Newtons will definitely move the ball. Because here, what has come into play? The concept of mass. We have studied the second law of motion, haven't we, child? What did we study in the second law of motion? We derived a formula from the second law of motion. F is proportional to mass * acceleration. Remember, child? This was derived from our second law of motion. What? There was a relation. There was a relation. Force is directly proportional to mass * acceleration. The formula is also F = ma, right? Now, here, child, here, child, if I, okay, if I take acceleration to this side. Look. If, child, sorry, if I take mass to this side. Okay? If I take mass to this side, brother? Then this becomes, child, this relationship becomes this. Tell me quickly. If I bring mass here, it goes into the denominator, and this becomes. Okay? Now, we know, child, that the value of force is the same. The value of force, brother, is the same. Here also 10 Newtons, here also 10 Newtons. Here also 10 Newtons, here also 10 Newtons. So, remove the force. Remove the force. So, from here, child, what is the relationship that is formed? The relationship formed here is that acceleration is inversely proportional to mass. What is the relation formed, brother? The relation formed is this. Through this, what relation is formed, brother? I have taken 1 here instead of F. Okay? And I have written it in reverse. Don't get sad like this. What has ma'am done? Okay? This was one. I just wrote it like this, okay? I brought 'a' here and 'm' there. Okay, brother? See, F is equal here, equal in both cases, 10 Newtons, 10 Newtons. So, don't consider it. Leave it. What relation came out between acceleration and mass? Between acceleration and mass, this relation came out: child, the less the mass of any object, the more acceleration, child, it will experience. Acceleration. What acceleration happened here, ma'am? What acceleration happened here? Child, suppose this ball was lying here. So, its initial velocity was what? 0 meters per second. You applied a force of 10 Newtons. It started moving. Suppose now its velocity became, say, 5 meters per second. Did acceleration happen or not? Yes, ma'am, acceleration did happen. It went from zero to five. Change in velocity. Change in velocity means acceleration. So, acceleration did happen here. Tell me, tell me. The one with less mass, its acceleration is more. What happened here, child? You applied a force of 10 Newtons. This was what? This was initially at 0 meters per second. It was at rest. Brother, applying your 10 Newtons of force will do nothing. It is still zero. Why? Because the mass is, child? It is very large. Because the mass is? It is very large. See, child, it's a simple thing. The one with more mass, there, the acceleration is less. Where did acceleration happen? It became absolutely zero. So, child, if we apply the same force, you see a simple thing, child. Earth and Earth and Earth and Moon, we apply the same force on both, child. This one and this one are applying the same force on each other. For example, I'm telling you, child. Suppose both of them are applying a force of 1000 Newtons on each other, child. Okay? This one is also applying that much. This one is also applying that much. Okay? So, brother, why is it orbiting in circles around it? Why is it orbiting in circles around it? Because the mass of our Moon is less. Because the Moon's, brother? Mass is less. Therefore, its acceleration is more. We learned this from here. Okay, child? Alright. Now, questions of this type come in exams. See, child. See, application-based questions have come: why do tides form in our oceans? Okay? So, we will say because, okay, what are tides, child? The water level rises and falls, these are called tides. And they happen because the gravitational force of our Moon is, child? It is attracting that water, okay? Towards itself. Due to which we see such rises and falls. Okay? Next question. The volume of the gravitational force exerted by Earth on an object. Child, how much gravitational force will the Earth apply on any of our objects? On what basis does this depend? Not solely on the mass of that object. It won't depend solely on that object, brother. Okay? Two objects are involved. Depends, depends on distance. Okay, brother? Mass, mass doesn't matter. It only matters what is the distance between those two objects. No, child, mass and distance both matter. What is the mass of both objects, both bodies? And what is the distance between them? On this, it depends. Okay, child? Now, if a question comes on our Universal Law of Gravitation, something like this. Okay? What is given? First of all, child, when any question comes, read it. Don't rush. After reading, first figure out what is given here. So, we have figured it out. What is given? See. First, write down what is given. We figured out that there are two persons whose mass is 50 kg each. That is, the two bodies here, the two bodies here, okay? One's mass is what? 50. And the other's mass is also what? 50. One's mass is what? 50. And the other's is also what? 50. 50 kg each is written. They are both, child? They are both, okay? They are, okay? They are 1 meter apart from each other. So, here, child, the value of r, the distance between two bodies, will be, child? 1 meter. Okay? You have to find out how much force these two are applying on each other. One person is 50 kg, and another is Samriddhi ma'am, 50 kg. Okay? So, child, two Samriddhi ma'ams, meaning one Samriddhi ma'am and another ma'am, both 50-50 kg, how much force are they applying on each other? First of all, whatever the force will be, it will be equal. Remember, if I am pulling her towards me by applying a force of 50 Newtons, then she is also pulling me towards her by applying a force of 50 Newtons. But what is that value, ma'am? You just said it as an example, but what is that force? What is that force, brother? For this, Newton gave a formula. Newton gave a formula. What formula did Newton give, brother? Newton gave the formula that to find the force between them. So, F = G m1 m2 / r². Take the distance between them. Okay? Take the distance between them, both their masses, and you should know the value of the gravitational constant. Now, do we know all this? Ma'am, we know it, but it seems very difficult. See, child, it's nothing. The value of the force will depend on what? First of all, what do you do, brother? Write its value. Brother, what is the value of the universal gravitational constant? 6.6, okay? 6.67, but you, brother. Okay? 6.67 * 10 raised to the power -1. Oh my. Okay? m1 is what? Mass of the first body, 50 kg. Mass of the second body, 50 kg. What is the distance between them? One. One squared, okay? It will remain one below. It doesn't matter. Simplify it, brother. 50-50 becomes, child? 2500. Okay. 67 * 10 raised to the power -1. Now, child, can I write this as 25 * 100? Can I simplify this and write it like this? Yes, ma'am, you can write it. I will write this as 6.67 * 10 raised to the power -11 as it is, child. Now, you see, child, when anything is -11, minus means it is below, below, below. There are 11 zeros. Mathematics, brother, mathematics. Anything I am writing, minus, above minus, brother, above minus means that all these zeros are below. What does this mean, brother? This means that below there are 11 zeros. There are two zeros above. So, brother, cut them from these. You cut two zeros from 11. You cut two zeros from 11. How many zeros are left? Nine. How many zeros are left? Nine. Shall I cut directly then? So, simplifying this further, brother, I wrote that these two objects, okay? These two bodies are applying force on each other. 25 * 6.67 * 10 raised to the power -9. Then this can be simplified further. See, brother, from here I removed the point and took a zero. Then I can cut this from this. Okay? So, child, it happened, right? Now we can do it. Okay? But I have told you that this is how we will calculate the answer. You need to know the mass of both objects. You need to know the distance between both objects. And the value of G is always there. 6.67 * 10 to the power -11. Okay? But is this my answer correct? No. This is incorrect. How, child? It's force. How much force is acting between them? We have told the value. Who will put the SI unit, brother? Newton. Remember Newton. Even if you calculate the answer, if you don't write Newton, then marks are gone, okay? So, from here, such numerical problems of the Universal Law of Gravitation do come, but inside NCERT and, child, nowadays, with the era of competency-based questions, analytical questions like these also come. Okay? What am I doing, child? I am showing you two. Okay? You do one as homework and tell me its answer. See, child. We are asked, "How does the force of gravitation between two objects change when the distance between two objects is reduced to half?" He said that, brother, if we calculate the force of gravitation between two objects. Okay? Okay? If we make some small changes in it, then how does the force of gravitation acting between them change? First, the easiest way is what? See, child, for any object, suppose, child, there are two objects. How much gravitational force will be between them? How will we calculate this? Okay? F = gm1 m2 / r². We have assumed. We have assumed, okay? We have assumed that there are two objects. One's mass is m1. Okay? What, brother? We have assumed there are two objects. Two bodies. One's mass is what? m1. One's mass is m2. And what is the distance between them? r. So, now, child, I have to find the gravitational force between them. So, ma'am, put everything here. How will we do it, brother? How will we do it? Okay. The force acting between them will be equal to G, m1, the mass of the first body, m2, the mass of the second body, and the square of the distance between them. If the distance is r, then we will take the square of the distance between them. Okay? Now the story doesn't end here, friends. The question is saying, the question is saying that if I, if I halve the distance found between these two objects. Meaning, if the distance between two objects was 10 meters before, and now I halve it, then it means five. Okay, if the distance between them was 50 meters before, and I halved it, then how much distance is left now? 25. So, he is saying that, brother, there were two objects. Both were applying gravitational force on each other. Okay? But now what did I do? I made some changes. What did I do? I halved the distance between them. Reduced to half. Okay? Did we change the mass? No. The mass was m1 before, it is still m1. It was m2 before, it is still m2. What did we change? The distance between the two objects, and we have done what? Reduced to half. Reduced means decreased. How much? Halved. If it was 10 before, it is now five. If it was five before, it is now 2.5. Similarly, if it was r before, then now it has become r / 2, child. It has become r / 2. So, now, let's assume, child, the force was F before. Now, let's assume, brother, we made changes. Okay? Suppose, child, we made changes, child? After changes, after changes, okay? Let's assume their force must have changed, right? Before the distance was something else, now the distance is something else, so obviously, child, the force acting between them must have changed. Okay? That force must have changed. Let's assume, child, the force acting between them now, we assume it to be F'. Okay? We called the force acting before F, and now the force acting between them, we have called it F'. Now, brother, how much will that force be? The value of G never changes, it will remain the same. Did we change the mass? No. The mass of the first body is m1. The mass of the second body is m2. What did we change? The distance. The distance was r before. Now the distance is r / 2. What is r / 2, brother? It is the square of r / 2. Do you understand, child? We have to take the square of the distance. So, the distance is r / 2, so we have taken the square of r / 2. Okay? Can I simplify this? Yes, ma'am, you can. See, write G as it is. Write m1 m2 as it is. And ma'am, do one thing, open it up. r / 2 * r / 2. Can I write it like this? Yes, ma'am, you can write it. Okay, now tell me. F' G m1 m2 written as it is. Can I write it like this? r / 2 / 4. Can I write it like this? Tell me quickly. r² / 4. I said r / 2. r² / 4. r into r is r², and 2 into 2 is 4. Okay, here, ma'am, there are some double fractions and things, so do one thing, take it up. Can I take it up? You can definitely take it up, ma'am. So, child, from here, what did F' become equal to? What did F' become equal to, brother? F' became equal to, child. This 4 will go up. Yes. Okay? And gm1 m2 is as it is. What is left below? r² is left below. Now, tell me one thing. Okay? Like, you know. Dora the Explorer. Can you see that G m1 m2 / r² is equal to what? Look, look, look, look, look, look, brother, look. Think. This gm1 m2 r² is equal to what? This whole expression is equal to what? It is equal to F. It is equal to F. F means the force that was acting before. This is equal to F. So, from here, child, what relationship did we get? What relationship did we get from here? That the new force, the new force, child, think a little and tell me. Can I write this whole thing as F1? Tell me quickly, brother. Sorry, I said F1. Can I write this as F? This is equal to F. So, from here, child, what relationship developed? The relationship that developed from here is that the new force will be four times the previous force. 4F. 4F means, it means that whatever force both objects were applying on each other before. Whatever force they were applying on each other before, now four times that force will be applied. What does this mean? That before, whatever force both were applying on each other. Now, the new force, child, is four times. If before both were applying, say, 100 Newtons of force on each other. Then now both those objects, those two objects, because now? Their distance has decreased. Think logically, brother. If the distance decreases, then the force between them increases. So, it became four times. Before they were, suppose, child, before they were 10 meters apart. Now they are five. Okay? Before they were 10 meters apart. We halved the distance. Halving the distance means what did we do, brother? We made it 5 meters. So, they came closer. So, between the two, what will happen, child? The force between the two will increase, right? See, it became four times F. Four times the previous force. Four times the previous force. It will be four times more. Okay. Let's do one more question like this. Okay? First, what did we do? We halved the distance between them. We halved the distance between them.

In the question, what have we done? We have tripled the distance. Let's take the normal case first. There is one body with mass m1. Another body with mass m2, and the distance between them is r. So, how much force will these two objects exert on each other, child? gm1m2 / r². Right? What did we do, man? We made some changes. During those changes, what did we do? We tripled the distance between them. We made it three times. So, if they were 10 meters apart before, now it's three times. Meaning, now they are 30 meters apart. Do you understand, child? If they were 100 meters apart before, now they are 300 meters apart from each other. Meaning, three times, triple. Okay? So, we did not change the mass of the object. Did we change the mass of the object? No. We definitely changed the distance. We made it three times. If the distance was r before, what is it now? Now it is 3r. Okay? So, it is asking, tell me, what will be the new force? This was the previous one. Now, what have we done? We have made some changes. So, after making changes, let's assume the force acting between them is f'. The value of g, man, never changes. It will remain the same. We neither changed mass m1 nor did we change mass m2. What is the distance between them now? The distance between them now is 3r. We will take the whole square of 3r, child. Do not make this mistake. What will be between them? The distance is 3r, and its whole square. Can I simplify this, child? Write g like this. Write m1m2 as it is. Can I open this, child? 3r * 3r. Can I write it like this? Yes, ma'am, you can write it. Now, child, tell me one thing. g m1m2 / 3r. Can I write 3r * 3r as 9r²? Can I write it? Multiply three by three, you get nine, and write r together as r². Okay. Can I write it like this? 1/9 gm1m2 / r²? Can I write it like this? Tell me quickly. Tell me quickly. Can I write it like this? 1/9 gm1m2 / r²? I can write it like this, ma'am? Yes, ma'am, you can write it. Man, tell me, what is this equal to? This is equal to f. That is, that is, from here, what is our expression, child? 1/9 f. Now, what is this? This means that whatever force was acting before, now only 1/9th of that force will act. Whatever force was acting between the two objects before, now only and only 1/9th of it will act. This is what we learned from here, child. I am giving you a question of this type, man. Please try it. I will write and tell you everything here. What do you need to do? You need to double both masses. The mass was m1 before. Now it is m2, and the distance is r. Okay? Let me do it myself, man. Let me do it myself. f = gm1m2 / r². This is the force between the two objects before. What did we do, child? We doubled both masses. We doubled both masses. If the mass was m1 before, what will it be now? 2m1. If the mass was m2 before, what will it be now? 2m2. Did we change the distance? No. So, the distance is still r. So, what will the new force between them be equal to? Man, write g as it is. Write g as it is. Right? The value of m1 has now become twice. The value of m2 has now become twice. We did not touch the distance. It is still r². Okay, man. Okay, man. Okay, what can we do? Can we multiply two by two? Can we multiply two by two? Yes, ma'am. So, can I write it like this, child? g * 4 m1m2 / r²? Tell me quickly. Shall I write it directly like this, child? Multiply two by two. f' = Two. Can I bring four forward? Write g as it is. Write m1m2 as it is. And we did not touch r² at all. Now tell me. Now tell me, what happened here? gm1m2 / r² is equal to what? f. So, man, the new force will be four times the previous force. Four times means if it was 100 before, now it is 400. Okay? If it was 10 before, now it is 40. Four times. Because what did we do, child? We increased the mass. If we increase the mass, the force also increases. We doubled the masses. We doubled the masses. So, now the force acting between them has become four times. Okay, child? We have spent a good amount of time and have read and understood the Universal Law of Gravitation. And now we will discuss acceleration due to gravity. What is this? Acceleration due to gravity means the acceleration that is happening due to the gravitational force. Remember, in the chapter Force and Laws of Motion, man, we learned a small concept right at the beginning: when we apply force to any object, acceleration occurs due to force. Remember, child. Many things were discussed. And when they were all summarized, this is what came out: force causes acceleration. Force causes acceleration. Remember? Yes, ma'am, I remember. Now, child, look here. What is happening now? Here, man, an apple is falling from a branch to the ground. Now, if someone asks why it is falling down, we will say, man, gravitational force is acting on it. That's why it is falling down. So, that means what is working on it? Gravitational force is working on it. Gravitational force is acting on it. Now, because gravitational force is acting on it, its acceleration is happening. Force causes acceleration. Force causes acceleration. So, its acceleration is happening. And why is acceleration happening? Because gravitational force is acting on it. The acceleration that happens due to the gravitational force is what we call acceleration due to gravity. Did you understand? A little bit. Look, what did I say? I said that gravitational force is acting on everything. Right? This pen is falling down. Right? This apple is falling down. Man, this ball, this ball is falling down. Because gravitational force is acting on all these objects. And when force acts on any object, acceleration occurs. Right? Look, child, it is accelerating. Right? This ball is accelerating. It is falling down. Right? Acceleration must be happening, man. Right? Here, it is falling down, so acceleration is happening. The acceleration that happens due to gravitational force is what we call acceleration due to gravity. Simple, simple. And what is its symbol, child? Its symbol is small g. Many children get confused between capital G and small g. Capital G was our universal gravitational constant, whose value was 6.67 * 10 raised to the power -1. But here, child, what we are talking about now is small g, and its value is also fixed, child. If we talk about Earth, the value of acceleration due to gravity on Earth is, child, 9.8 meters per second squared. Why is it called meters per second squared? Because it is acceleration. First point. What is acceleration due to gravity? When gravitational force acts on any object, acceleration will occur due to the force. And the acceleration that happens due to the gravitational force is called acceleration due to gravity. And it is represented with the help of g. Right? It is represented with the help of g. Why is its SI unit meters per second squared, man? Why meters per second squared? Because it is acceleration. It is a vector quantity. Vector quantity means, man, what is acceleration? It is a vector quantity. It has magnitude and it has direction. Look, man, remember one thing: acceleration occurs in the same direction as the force. This is a small concept that I also told you in the motion chapter, child. Acceleration occurs in the same direction as the force. Where is the force acting? Downwards. Gravitational force is pulling everything downwards. Where is the force acting, child? Downwards. Where is the force acting? Downwards. So, what will be the direction of our acceleration due to gravity? Downwards. So, remember, it is always in the direction of the force. Okay? Now, child, I have told you here that the value of our Earth's acceleration due to gravity is 9.8 meters per second squared. Now, where did this value come from? What is its formula? Right? How did we derive this value? And can we find the acceleration due to gravity of other planets and celestial bodies? Absolutely, we can. Let's see, child. Right? First, we will find its formula, child. Right? First, we will find its formula. Look, child, we said that any object on Earth, any object present on Earth. On that object, what is happening? Earth. Earth is applying what? Gravitational force. Whether it is this pen, whether it is me, whether it is this ball. Right, child? If we all become like this, we will all go downwards. Earth is applying gravitational force on all of us. And, child, when gravitational force is acting on us, what is happening? Our body is accelerating. Our body is accelerating. The acceleration, child, its value is 9.8 meters per second squared. But where did this value come from? Man, there must be some formula. How did we find it? So, what is its formula, child? Let's derive it. Look, child, assume, assume this is our Earth. Right? Now, assume, child, this is our Earth, and let's assume the mass of the Earth is m. Let us assume that the mass of the Earth is m. Okay? Let's assume this is the center of our Earth, and from here to here, we have taken this as the radius of the Earth, and we have assumed it to be r. Okay? Now, assume, child, there is a small ball on the surface of our Earth. Assume, child, there is a small ball on the surface of the Earth, like, man, like this. Like this, man, this ball is lying on the surface of the Earth. Right? Now, its mass, man, what would it be? Compared to the Earth, man, what would its mass be? But still, man, don't underestimate. We shouldn't do that. So, let's take its mass too. We have assumed it to be small m. We have taken the mass of the Earth as capital M, and the mass of that object as small m. Okay? Now, what do we need to do? G. Now, what do we need to do? Let us try to find out how much will be the force of attraction between them. Assume, child, Earth is one object, and this ball is an object. So, these two must be exerting force on each other, and that force will be equal to each other. Didn't the Universal Law of Gravitation teach us this? That just as much force Earth is pulling this ball towards itself, man, that much force is also being exerted by this ball on Earth. Now, how do we calculate that? Man, how do we calculate that? Oh, ma'am, there is a formula. Very good. What is the formula? Tell me. Chintu, Mintu, Pintoo, G, quickly, and Chinti, Minti, Pinty, all tell me. Chintu, Mintu, Pintoo, Chinti, Pinty, all tell me. What is the formula? Ma'am, the formula is f = f = g. What is the formula, ma'am? The formula is f = g m1 m2 / r². Right? This is the formula. Okay? Now, what do we know here? What do we know here, man? We know quite a few things here. We will put the values of everything one by one. But this is the basic formula that we learned earlier. Okay, now tell me quickly, child. Let's assume these two things are exerting force of gravitation on each other. What are these two doing, man? Earth is pulling this object towards itself. And this object is also doing what? Pulling Earth towards itself. Do we know this? Yes, we know this. Now, child, what do you do here? Put all the values. What do you do with all the values? Man, how much force are these two exerting on each other? How do we calculate it? G is a constant. Its value does not change. m1 is the first object, and m2 is the second object. Our first object is Earth. What is its mass? m. The second object, the second object is this small ball. What is its mass? We have taken it as m. Child, m1m2 means the masses of both objects exerting force on each other. So, our first object is Earth. We have taken its mass as m, and the second object, child, its mass we have taken as m. m. And, child, what will we do here? Here, we will take the distance between them. Child, use your brain a little. Tell me one thing. Any object, child, is on the surface of the Earth. Right? So, what is the distance between them? You can assume, man, that the distance between them is equal to the radius of the Earth. We took the center of the Earth here, and until we reach the surface above, we measured its radius. Now, child, the distance between them, man, how big is the Earth? How small is the ball? Right? So, child, we assume here that the distance between them is equal to the radius of the Earth, which is equal to r. So, here we will take r squared. Okay? Now, this is, child, what? This is the force of gravitation between them. This is the force of gravitation between them. Okay? Let's call this one and pause for two seconds. Let's call this one and pause for two seconds. Let's come back here. Let's come back here, child. I will remove this. Tell me one thing, child. Tell me one thing. What is the formula for force? What is the formula for force? What is the formula of force? What did we learn in the second chapter? In the second chapter of physics, Force and Laws of Motion, what did we learn? f = f = mass * acceleration. We learned this. Yes, ma'am, we learned this. Child, we said, we said that force is acting on the object. Which one? Gravitational force. Right? On Earth, any object on Earth. Right? What is acting on it, man? Gravitational force is acting on it. Okay? Now, child, when force acts on that object, assume its mass is m. Right? So, what does it show? It shows acceleration. Due to the force, acceleration occurred. The acceleration that occurs due to the gravitational force is what I call? Acceleration due to gravity. Simply, can I not say here that acceleration can be written as g? Just tell me, child, is acceleration due to gravity small g? So, can I write g instead of a here? This is also acceleration. This is also, child, acceleration. This is also acceleration. Which one? This is the acceleration due to gravity. Right? And we assumed this is, child? We assumed this is the force, the gravitational force acting on an object whose mass is m. So, from here, child, another formula for force is formed. Right? From here, another formula for force is formed. mg. And I will do one thing, I will call this one. And I will call this, child, two. I will call this one, the one behind, and I will call this two. Now, what will I do, child? From one and two, you see one thing, child. What is one? Force = mg. And what is two? f = gm m, which is the mass of the Earth, m, which is the mass of the object, and the square of the distance between them. Okay? Let's go. Now, child, is anything canceling out here? Tell me something. Look, child, this m is on top here, so it will go below. So, this m will cut this m. Both these m's are cut. From here, child, a formula for acceleration due to gravity is derived. From here, a formula for acceleration due to gravity, small g, is derived. Which is g * m / r². You might think, what happened, ma'am? And what is its use? So, let me tell you, this is a formula with the help of which you can find the acceleration due to gravity of any planet. The value of Earth's acceleration due to gravity, 9.8, is calculated from this formula. Do you know the value of g? 6.67 * 10 to the power -1. Do you know the mass of Earth? Right? 6 * 10. Actually, it is 5.98 in NCERT. Somewhere it is written as six, somewhere as 5.98 * 10 raised to the power - not not minus. Okay? 10 raised to the power 24 kg? But let me tell you, child, this is a formula. This is a formula that can give us the acceleration due to gravity of any planet, any celestial body. Okay? Let's remember the formula. What do we need to know? We need to know the mass of that planet, and we need to know the radius of that planet. We know the mass of Earth. We know the radius of Earth. We will put all the values, and we will get the acceleration due to gravity. Look, child, from here, what is it? Any spherical body, man, not just any planet. You can find the acceleration due to gravity of the Moon, Mars, Saturn.

No? You can find the acceleration due to gravity of anyone, like Mercury. Okay? When we say that the value of acceleration due to gravity on Earth is 9.8 meters per second squared. So, brother, it came from this formula. What is the formula? What is the formula? Suppose you want to find the acceleration due to gravity of any planet, say planet P, right? What will be the formula for the acceleration due to gravity of that planet, child? Capital G, whose value does not change, it is constant. The mass of that planet, okay? And the square of the radius of that planet. Okay? This is the formula. This is the formula. This is written as PPQ. It means if you know the radius of any planet, the mass of any planet, then you can find out what the acceleration due to gravity will be there. You can find it out. For example, let's look at Earth. Right? For example, let's look at Earth. What is the formula? Tell me quickly. What is the formula? Tell me quickly, quickly. What is the formula? The formula for finding acceleration due to gravity is, ma'am. G m / r² means what do we need to do? We need to put the mass of Earth and the radius of Earth. What will be the answer from here, brother? Tell me quickly. What will be the answer? Tell me quickly. Tell me the value of Capital G. The value of Capital G is 6.67 * 10 raised to the power -11. Into, you should know the mass of Earth, child. Child, in NCERT it is written as 5.98 * 10 raised to the power 24. But by rounding it off, what do we do, child? We take it. 6 * 10 raised to the power 24 kg upon upon, here, child, look at six. This is the radius of Earth, given in NCERT, child. Right? By rounding this off, when we calculate it in kilometers, we call it 6400 km. Right? But if we follow NCERT exactly, if we want the exact exact number, right? Then 6.37 * 10 raised to the power 6, its square. If you have the courage, complete the calculation, and when the calculation is complete, child, right? Then the small g, small g, meaning acceleration due to gravity, will be approximately 9.789 something something, right? 9.7 something something something something something will come, which by rounding off, we approximately say 9.8 meters per second squared, because it is acceleration due to gravity. Now, child, you must know in school, to make your calculations a little easier, right? To make the calculations a little easier, child, you are told 10 meters per second squared, that brother, take this. Now, child, I will pause for 1 minute and want to tell you something simple, child. Look, in many schools, numerical problems are done using 9.8. In many schools, child, they are done using 10. Child, the best way is to ask your school ma'am or sir, that sir, if a numerical problem comes in the paper, please tell us beforehand what values we should use. Because it is better to ask first than to do it wrong. Ask in advance for the exam. Then it will be like, ma'am, I calculated it this way, you calculated it that way. It should have been done this way. So, brother, go before the exam and say, excuse me, ma'am. Ma'am, I wanted to ask something, please tell me. Please talk respectfully, right? And ask, ma'am, what should be done, right? Sometimes it is given in the numerical problem that this value should be used, right? Like in NCERT, child, there are some numerical problems where it is given to use 9.8, right? So, child, we will use 9.8 there. But if it is not given, please, child, ask. Right? So please ask. Similarly, child, if you want to find the acceleration due to gravity of any other body besides Earth, what will we do, brother? We will use the same formula. We will use the same formula. Apply this formula, brother. Apply this formula. What is the formula? g acceleration due to gravity = g mass of the moon and upon r radius of Earth squared, sorry, I said Earth, you will take the moon's square. Meaning, meaning, child, if you want to find out that any object, right? Wait, wait. What are we doing? We are finding the acceleration due to gravity of the moon. Of the moon. Meaning, meaning, assume, child, this room is the moon. Wow, right? On the moon, if I threw an object like this, then obviously the moon will pull that object towards itself. Suppose, child, I took this pen to the moon, and on the moon, I dropped this object. Then, child, this object will fall towards the surface of the moon, because the moon is applying what on it? What is the moon applying on it? Very good. The moon is applying its gravitational force on it. And when the moon is applying its gravitational force on it, right? Then, child, it is going down, down. Its velocity will change. Change in velocity means there will be acceleration there. How much will that acceleration be? Acceleration means how fast is its velocity changing, child? How fast is its velocity changing, child? We are going to find that value. We are going to find that value. So, acceleration due to gravity on the moon will be equal to, child, tell me the value of Capital G, what will it be? 6.67 * 10 raised to the power -1. Into, what do you do, brother? Take the mass of the moon. Brother, it is given in NCERT. It is good if you memorize it, right? It is good. Because later, when you grow up, in the 11th grade, there is a chapter called Gravitation, where you will have to memorize it. So, try to memorize it in the lower classes. Okay? Besides that, what do you need to do, brother? Take the radius of the moon. 1.74 * 10 raised to the power 6, its square, child. And also check, child, it should be in meters here. Everything should be in SI units, right? Don't do kilometers. So, you need to keep this in mind, brother. Now, if you complete this complex calculation, right? With courage. Then, child, the acceleration due to gravity on the moon, its value will come out to be 1.6 meters per second squared. What will come out? It will come out. What did we learn? What did we learn? We learned a formula. We learned a formula. With the help of that formula, what did we do, brother? With the help of that formula, we found the acceleration due to gravity on Earth, which is 9.8 meters per second squared. The acceleration due to gravity on the moon, which is 1.6 meters per second squared. Child, what is the meaning of these two things? The meaning of these two things is that when something is on Earth, right? When something is falling on Earth, right? When something is falling on Earth, or when gravitational force is applied on anything on Earth, child. Due to force, what happens, child? Due to force, there is acceleration in it. The acceleration that object experiences, right? Acceleration means change in velocity. So, child, when this object is falling downwards, its velocity, its velocity is changing, and its velocity is changing, meaning it is accelerating. And when it is accelerating, how fast is it changing its speed? 9.8 meters per second, meaning not speed. Do you understand what I am saying? Brother, how fast is its velocity changing? 9.8 meters per second squared, and on the moon, the change is coming at 1.6 meters per second squared. The velocity is changing. This is the meaning. If we compare them, child, then a relationship develops from here. A relationship develops from here. Where we can say that the value of acceleration due to gravity on the moon, what is the acceleration due to gravity on the moon? It is 1/6 of that from Earth. It is 1/6 of the acceleration due to gravity on Earth. If the acceleration due to gravity on Earth is 9.8 meters per second, then on the moon it is 1.6. That is, if we compare the acceleration due to gravity on the moon with the acceleration due to gravity on Earth, it is only 1/6 of it. It is only 1/6 of it. We can also write this, child. We can also write this. Acceleration due to gravity on the moon is 1/6 of acceleration due to gravity on Earth, right? I can also write this, child. Remember this, child. From this, we will also derive a relationship for weight. You have to remember this. Okay? 1.6 is approximately 1/6 of 9.8. This is what we have learned. Now, child, questions of this type will not leave you. So, it is better that you learn to practice them. Look, child, what is it telling us? Child, what is it telling us? It is telling us that we need to find the acceleration due to gravity. We need to find the acceleration due to gravity. That is, we need to find g. Okay? Of a planet whose mass is m and radius is r/2. So, brother, we know this. We know this. What is the formula? The formula is g, sorry, g * m / r². Right? We need to know the mass and the radius. So, child, we simply need to put the values. Right? So, child, the acceleration due to gravity of this planet will be equal to? Child, don't start putting values here. Don't start writing 6.67 because nothing else is given. So, we will write g as it is. Its mass is m. Brother, what is the radius given? The radius is given as r/2, meaning (r/2)². (r/2)². That means, that means I will write g like this, child. I will write Capital M as it is. r/r/2 * r/2, shall I write it like this? Yes, ma'am, write it. Shall I simplify it further and write it as r²/4? Can I take 4 to the top, child? Can I take it to the numerator? Yes, ma'am, you can take it. So, brother, what will be the value of g from here? What will be the value of g, gg, which will be our acceleration due to gravity, will be 4gm/r². This is the answer. This is the answer. Okay, child. Now, some questions come to us like this: what will be the acceleration due to gravity at the poles? What will it be at the equator? Right? Some questions of this type come. I will show you further, but let's have a general discussion. If I ask you, what is our Earth like? Then 99% of children will say that Earth is round, ma'am. Mom's roti is round, dad's money is round, the Earth is round, and our subject is also round, it's a mess. Right? Right? Everything has become round. Okay, child, so let me tell you. When we talk about Earth, Earth is not a perfect sphere. Earth is not a perfect, proper, perfect spherical body. Earth is not like this, child. Earth is like this. Ellipsoid, right? The shape of the Earth is elliptical like this. It has an ellipsoid shape. But, child, to be more specific, if I, right? If we talk a little, right? We talk, child, we cannot even call it a proper ellipsoid. Because we know this, child, on our Earth, there is Mount Everest somewhere, there is Kanchenjunga somewhere, there is a mountain somewhere, there is a deep, right? There is something, a volcano is erupting somewhere. So, brother, the point is, it is flattened somewhere, it is raised somewhere. Right? So, brother, our Earth does not show a proper smooth surface like this. Right? Right? So, we can say, what is the shape of our Earth? We will say, child, what is the shape of our Earth? How will we tell? We will say, brother, our Earth shows an irregular ellipsoid shape. Ellipsoid means like this, and brother, it is not properly smooth. It is irregular. Right? It is irregular. Right? So, we say it like this. Now, child, when we talk about Earth, right? Then, child, we have been talking for a long time about the radius of Earth, the radius of the moon. So, we are very much concerned about the radius. Right? Because on that, brother, the value of acceleration due to gravity depends. We know this. So, child, suppose this is our Earth, and let's assume, child, this is the center of our Earth. Okay? This is the center of our Earth. What is this? These are the poles. North Pole, South Pole. Right? North Pole, South Pole. And here, brother, there is an imaginary line, child. Right? Which passes exactly through the center of our Earth. What will be its name? Its name will be Equator. What will be its name, brother? Equator. Right? Its name will be Equator. So, let's assume, child, this is our center. These are our poles, and this is our equator. I will ask you a simple question. Please think carefully and answer, child. If I measure the radius from this center to here, and measure the radius from this center to the pole, child. That is, I measured the radius standing at the equator, and I measured the radius standing at the pole. Tell me, child, will both radii be the same? The answer is no. We can see that it is not a proper sphere. It is slightly flattened at the poles and slightly spread out. So, that means this, what is this, child? Let's assume, child, I called this the radius of Earth at the equator. EQ means equator. Right? And I called this the radius of Earth at the P, meaning pole. Okay? So, from here, child, what is the first thing we learned? That the radius at the equator is greater than the radius at the pole. Child, if you measure from the center to the pole, the radius will be less. But if you measure the same radius at the equator, it will be greater. This is the first thing we learned. Now, why are we discussing this? We are discussing this, child, because we have read a formula, brother. We have read a formula before, right? And what was the formula? The formula was this. The formula was that acceleration due to gravity depends on the mass of Earth and the radius of Earth. Have we learned this formula before? Yes, ma'am, we have learned it. The acceleration due to gravity on Earth, meaning the value of g, meaning the number 9.8 that we calculated, with what help did we calculate it? With the mass of Earth and the radius of Earth. Now, here, brother, there is some non-uniformity visible in the radius. So, child, if I have to derive a relationship between g, acceleration due to gravity, and the radius of Earth, what will it be? Child, what will be the relation? Tell me quickly. Can I say this by looking at it? Can I say by looking at it that acceleration due to gravity is inversely proportional to the radius? Tell me quickly. Tell me quickly. Can I write it like this? Tell me quickly. This same thing, I have written it like this. We need to establish a relationship between the two. If my radius value decreases, then the acceleration due to gravity will increase. Is this what is understood from the relation? So, where, where, child, where the value of our radius is less, there the acceleration due to gravity will be more. Look, child, at the pole, the radius of the pole is less. The radius of the pole is less. So, at the pole, child, at the pole, child, what will happen? At the pole, remember, acceleration due to gravity will be more. Acceleration due to gravity will be more at the pole. Not much more. It's not like it suddenly goes from 9.8 to 11.8. No, it will be a very slight change. But yes, it will be slightly more than 9.8. Okay? Same thing, child, here at the equator. At the equator, the radius is more. So, at the equator, because the radius at the equator is more, the value of acceleration due to gravity will be less. The radius at the equator is more. So, what did we understand from this? We understood that the acceleration due to gravity at the equator will be less. Less. So, slightly less than 9.8. Not like it becomes 5.8 from 9.8. Or no, it will be slightly less. Okay? So, child, questions also come on this. Right? Questions of this type come in the paper, that brother, will the acceleration due to gravity be more at the pole or at the equator? So, brother, don't just write the direct answer. You scoundrels, write the answer with the correct logic, supported by the correct reason. It's not like ma'am said, so write it. We won't do it blindly, child, right? We won't do it like this. Please, there are reasons. You have to support everything with a correct reason and write the answer in the paper, child. Okay? So, g is maximum. g is maximum at the poles and minimum at the equator. Why? Because it is dependent on the radius. Is this understood? And from this, child, right? From this, child, our topic also ends. But before we move forward, child, please make sure we know the difference between Capital G and small g. Okay? Capital G is the universal gravitational constant, right? And this is, child, acceleration due to gravity. Its value, child, always remains the same. Brother, whether you go to Earth, Moon, Saturn, Jupiter, anywhere, its value will be the same: 6.67 * 10 raised to the power -1. But the value of G, which g? The value of acceleration due to gravity, brother, is not the same throughout the universe. On Earth it is 9.8, on Moon it is 1.6, on Mars it is 3.8, right? Yes. So, this value is not the same. The value of every planet, every spherical body, or every celestial body is different. It depends on its mass and its radius. Okay? Varies from planet to planet. Its value, its value, we have talked about Earth. Okay? And its unit is Newton meter squared per kg squared, and its unit is meters per second squared, because it is acceleration. Remember, brother, this is acceleration, and this is a constant. Okay, child? Now, let us read, child, about what? Let us talk about free fall. Now, what is this free fall? I have heard a lot about Free Fire. What is this free fall? What is free fall? What is free fall? Right? Look, child, I am telling you two things. Listen carefully. Suppose, child, in my hand, what is there? A feather. And in my hand, what is there? An iron ball. Right? In this hand, there is an iron ball. In this hand, what is there? A feather. I kept both like this. I kept both like this and let go. I kept both like this and let go. Tell me, which one will reach down first? And all children will say, ma'am, obviously the iron ball will reach down first because it is heavy. The feather is very light. It will swing, swing, swing, slowly, slowly, slowly, oh, right? It will go down slowly. Oh, the logic is correct. Absolutely, and you must have observed it. But here, child, I am not talking about normal conditions. Here, I am talking about free fall. What is free fall? First, I will tell you that, and then the question I asked you again, that.

I will ask you questions. Okay? What is free fall? Right? This is free fall. When we jump like this. Right? From an airplane, brother, I really want to. One day in life, brother, I will definitely go skydiving once. I won't tell mom because mom will never let me do it. Right? My family, brother, absolutely does not allow adventure activities. But I will definitely do it once, friends. Right? Okay, but let's leave this aside, let's talk about this pen, brother. If I leave it, where will it go, right? If I free it, think, son, I have held this also with my hand to stop it. As soon as I remove my hand, it is free. It will fall downwards, right? Similarly, son, this ball, this apple, or we, son, will go down, will fall downwards, okay? So, ma'am, when any object falls downwards, it is called free fall, right? No, wrong. Listen, son, first see the definition of free fall. What do we mean by free fall? When we say that an object is in free fall. When we say an object is in free fall. What does it mean? Look, son, when an object falls. Right? When something falls, son, right? When an object falls and goes towards the Earth. Okay? Under the influence of gravity, what do we call it? We call it free fall. So that's what we were saying, ma'am. We didn't. Son, whenever I say that, oh, this object is in free fall. It means that at that time, I have assumed that no other force is acting on it at that time. I have assumed this. Okay? I have assumed this. It's not that no force is acting on it at that time. It must be acting. But I have assumed that at this time, this object is going downwards. It is falling downwards. And what are we observing on it? We are observing that only and only what is acting on it? Only and only what is acting on it? Gravitational force is acting on it. Okay? Now, son, you okay? I will ask you that question again. Okay? I will ask you that question again. Did you understand this? What do we mean by free fall? At that time, only and only which force will be acting on it? Gravitational force will be acting on it. At this time, only and only what is being exerted on it? The Earth's gravitational force is being exerted on it. At this time, no air drag, no air resistance, no other force is acting on it, so we will say what? It is in free fall. Okay? One point. Only and only when gravitational force acts on an object and when it moves towards the Earth due to that gravitational force, we call it free fall. That is, son, now I will ask you that question again. Suppose, son, there is no air. Suppose, son, there is no air. A vacuum has been created. There is no air. Not even a single particle of air. A vacuum has been created. I have an apple and sorry, I'm saying apple. An iron ball, an iron ball and a feather. What did I do? Placed them side by side. Okay? Now what will happen? No air. Now tell me, who will fall first? Just tell me quickly, who will fall first? Still, children will say, ma'am, the iron ball will fall. Let me show you with the help of a video. Here I have an iron ball and a feather. Now you have to observe two things here. First, the first case we have is where we are doing this experiment, there is a lot of air. And obviously, due to air, what will happen? There will be air resistance, and our feather will sway in the air, moving here and there. So let's see. If the condition in the room is such that there is air, and I have an iron ball and a feather, then who falls first between the two? Who falls later. Let's see this. With air resistance. As we said, the iron ball fell first, and the feather is coming slowly, slowly, swaying leisurely. Now what do you have to see here? Second case. What is written in the second case? Without air resistance. This means that in this room, right, where this experiment is being done, we have created such conditions in that room that there is not even a little bit of air in the room. All the air has been sucked out, there is no air there. It's empty, absolutely no air. What happened? It became a vacuum. There is absolutely no air there. And now what did I do, son? Now I released the iron ball and the feather together. No air. Now see what will happen. Think what will happen. I'll tell you. What will I tell you? I'll show you. See what will happen. The iron ball and the feather, how they are slowly, slowly, right, obviously, it's in slow motion, but please see, son, both are reaching the bottom at exactly the same moment. Look again, there was air, so see, the iron ball fell down first. But the feather came later. Swaying. But see here, son, without air, both were released together, and both struck the ground at exactly the same time, son. At exactly the same time. So if, right, if we talk about free fall here, then what is free fall, son? Free fall is a motion, a movement in which gravitational force is acting on the object. And no other force is acting. No air drag, no air resistance, nothing is acting. Only and only what is acting? Gravitational force. So when gravitational force acts on any object, in what way, right? In what way is it moving? In what way is it moving? That movement, that motion, we call free fall. Right? Why is it going down, brother? Right? See, son, why is it going down? Why is it going down? Because it is in free fall. Right? Okay. Now, son, when we talk about free fall, there are different examples. Right, son? There are different examples. Different examples, like, brother, you threw a stone from the roof. It's going down, brother. Right? What is acting on it? The Earth's gravitational force is acting on it. Right, brother? An apple is falling. It breaks from the tree and falls down. Right? You threw a ball upwards, son. But ma'am, that wasn't free fall. It was, brother. You threw the ball upwards, but for how long did it go up? After a point, it will also come down, right? So whether an object is going directly downwards. When you throw an object upwards, brother. The gravitational force is also acting on it, right? See, when this pen is going upwards. It is going up. But the Earth is saying, come, come, come down. How high will it go? Right? So, brother, it goes up to a point. But the Earth's gravitational force pulls it back. So whether, son, the object is going directly downwards like this, or whether I threw it upwards and then it is going downwards. It is in free fall. Okay, son? Now, son, we have to do some good numerical problems of free fall. And these also come in exams. But before doing these numerical problems, brother, I want to discuss a simple thing with you. Which confuses many children: ma'am, when do we take what as positive, when do we take what as negative? So I have made it very easy for you. If, son, it is given in the question that, brother, there is an object, it is going downward. If an object is going downward, then what should be the direction of all these variables? Right? And if an object is going upwards, then what should be the direction of all these variables? Let's understand, son. First, let's take a normal case, son. Suppose there is a building. There is a certain height. Right? Let's assume, son, there is a building. Right? There is a building. Suppose there is a building. There is a certain height. I have called it h. Okay? I have called it h. Right? I went up to this height and from that height, what did I do? I threw this ball. This ball will come down. This ball will come down. Right? Okay? What is its motion like? It is a downward motion. Right? It is a downward motion. Remember, what are we talking about? We are talking about downward motion. So when any object, son, moves downwards, okay? What will be its initial velocity? First of all, tell me, son, from here I dropped it. So when it started, what was its initial velocity? Zero. Right? Brother, here I am standing with an object, with a ball. Here I am, standing with a ball. So as soon as I dropped it. Where did it start from? It started from zero, right? Then its speed will be 2 meters per second, 4 m/s second. Whatever the speed, son, it started from zero. So what is the initial velocity, brother? Zero. Right? What is the initial velocity? Zero. Okay? Now, son, we know that velocity is a vector quantity. A vector quantity has direction. So obviously, brother. Velocity will have some direction. Will it be positive or negative? Son, it's a simple concept. We study the Cartesian plane. Son, you study in math, son. We make a Cartesian plane like this, son. Right? If I take this as positive, then what will I take this as? Negative. Right? If I take this as positive, then what will I take that as? Negative. Right? So according to that logic, son, now tell me, where is our object going? Downwards. So its final velocity, right? The direction of its final velocity will be what? Downward. So that's why, son, we will take it as negative. Right? We will take it as negative. Okay, here a means acceleration. What is the acceleration happening to it? Acceleration due to gravity. That it is going down, down, down due to gravity. So, son, here, here, the value of our acceleration, the value of our acceleration here, that is, the value of g, what will we take? We will take it as negative. Why? Why? Tell me something. What did I tell you? In the direction in which the force acts, in that direction, what happens? Acceleration also happens in that direction. This is a simple thing we have learned, son. In which direction is the force acting? Tell me. This ball, this ball is being pulled downwards. So the force is acting in this direction. What is the direction of the force? Downward. What is the direction of the force? Downward. Brother, force is acting in the downward direction. That's why this ball is going down. So what will be the direction of acceleration? Downward. Brother, the force is pulling it down. The direction of the force is downward. So the acceleration due to gravity. What will be the direction of acceleration? Downward. Very good. So here, son, it will be negative. Minus. Okay? So what value will you take? -9.8 meters per second squared. Okay? Or 10, or -10, right? So you can take anything, brother. Whatever is given in the question, just remember this minus. Otherwise, the correct answer will not come. Either -9.8 meters per second squared or -10 meters per second squared. Take it in minus. If the object is going down, son, then to solve that numerical, you will take the value of g in minus. Okay? Now, son, s here is displacement. f here is displacement, brother. This ball started from here. This is its initial point, and this ball stopped here. It started from here, and this ball stopped here. So how much displacement did it cover? It covered a displacement equal to its height. How much displacement did it cover, brother? Tell me quickly. What will be the displacement here? The total distance and displacement will be the same. It came from here to here. It's a straight line, right? It's a straight line. So, son, the height of this building will be its displacement. So somewhere, son, you will be asked to find the height. Okay? So, son, you will calculate the value of h. So if you need to find the value of h in the numerical, then, brother, what will you do? You will calculate the value of displacement. Okay? You will calculate the value of displacement. And t, brother, time varies. Brother, if I throw this ball from the first floor, it will reach down quickly. Right? If I throw it from the fifth floor, it will take time. If I throw it from the tenth floor, it will take more time. So t, brother, it varies. If any object is going downwards like this, then it depends on how high I threw it from. So this will vary. Okay? So this will vary, brother. Let's do one numerical. Right? Let's do one numerical. It will become clearer with a numerical. What is given to us, brother? What is given to us? We are given the question. What do we have, brother? We have a building. Right? A building whose height is given as what? Its height is given as 80 meters. Right? What is given as h? 80 meters. Okay? Let's go. We had what? A ball. We dropped it from this height of 80 meters. It came down and went down. So where is this ball placed, brother? Let's assume, brother, this ball is placed here. We dropped it. Now it has come down. So we have to tell how much time this ball will take to come down? And when it comes down, down, down, what will be its velocity here? We have to tell this. First, tell me, son, when we dropped it from here. When we just dropped it like this. Oh oh oh oh Rohit Sharma cancelled, Samriddhi Sharma tick tick. Okay. Yes, so what will be the value of u here, son? Tell me. u will be zero. When we drop any object from a height, its initial velocity is zero because it started from zero. So let's do one thing, brother, let's write down whatever we know. What is the best way? Write it down, brother, write it down. What do we know? What do we know? We know the initial velocity is 0 meters per second squared. Not not squared, only meters per second. Okay? We know this. We know this. The height is 80 meters. Brother, if I say height, what is it? It is 80 meters. So why is its displacement also 80 meters? Tell me quickly. It went from here to here. It went from here to here. So how much distance did it cover? 80 meters. And what is its displacement? It is also 80 meters. Okay? So, son, here instead of H, I'll write S, or you can write both H. Okay? Let's go. And what else do we know? We know how much time it will take? No. We don't know. Question mark. We know what the final velocity will be? No. Question mark. Yes. But we know that when it goes down, down, down, there will be acceleration. Right? There will be acceleration. Brother, from zero, it must have gained some speed, right? 10 meters per second. It must have gained some speed between these two. Speed has changed. Acceleration must have happened. And what must have been the acceleration? Tell me quickly. Acceleration due to gravity. What value should I take for g? What value should I take for g? Tell me quickly. To make it easy, easy, I'll take 10. But what should I take as 10, brother? I'll take 10. Minus. I told you earlier, brother. Take minus. If you make a mistake in minus and plus. If you make a mistake in minus and plus, the answer will not be correct. And I have made a mistake here. Right? I have made a mistake, mistake, mistake, mistake intentionally. And I will see who among you can identify it. Brother, until now I was talking about height. Until now I was talking about height. But as soon as I told you here that, brother, this is displacement. Displacement is a vector quantity. A vector quantity has direction. Now tell me, son, based on the direction of its displacement, should I take it as positive or negative? Brother, where is it going? Downward. In the downward direction, son, its displacement will be what? It will be -80. Remember. I have written it here earlier as well. Right? Negative. These small things need to be remembered. Now what do we need to find? We need to find the answer here. We need to find the answer here. How to find it? This is very difficult, ma'am. That's why I said you should understand the chapter on motion well. In the chapter on motion, we studied the three equations of motion. And with the help of the three equations of motion, we will find both answers. One is that we need to find the time. Right? What is the formula for time? Right, brother? How can we find time? v = u + at. Oh my god, how do we find this, ma'am? We know u, but we don't know v. So how to find t? We don't know this, and we don't know this either. So I can't use this formula. Brother, do I have any other formula with the help of which I can find the final velocity? Let's see, there is a formula which is v² - u² = 2as. Right? What is it, brother? This is a formula. Remember? Yes, ma'am, I'm remembering a little bit. Put your mind to it, and you'll remember everything. Now, son, we don't know the value of v. We need to find it. Okay? The value of u. We know the value of u. Zero. Okay? Write 2 in place of 2. What is a? Acceleration. What will you take for acceleration? We will take -10, brother. We will take -10. And how much displacement has it covered? It is 80. It is 80. And 80 what? Brother, 80 what? -80. -80. That's right. Tell me quickly. -80. Now, son, here 0 is 0, remove it. Right? Now what is left here? 2. Minus. Minus. Minus. Minus. It became plus. Right? Now, son, tell me, tell me, right? Tell me, what will this be? Right? 20. 80, right? My 1600. What is this coming out to be, son? What is it? 1600. This is squared. Oh dear, how can it be minus minus? It will remain minus, right? Yes. Now, son, tell me something. Tell me something, right? Tell me something. I will put all the values, okay? Multiply them, brother, right? Multiply 80 by 20. It came out to be -1600. I took the square root. It came out to be -40 meters per second. But ma'am, how can velocity be negative? Brother, why not? Tell me, son. What did I tell you earlier? Earlier I told you that, brother, the velocity we will take will be negative. So

Here it is, brother, our velocity is negative. The question is still not complete, son. When will the question be complete? When we complete it. Now what is to be done? We have to find the time. To find the time, now I can apply this formula. v = u + at. Now what can I do, brother? I can apply this formula. v = u + at. We know the value of v is -40. We know the value of v. The value of v is -40. We know the value of u is 0, plus acceleration due to gravity is -10. We do not know t. Here, son, write -40 as it is. -10t. Minus and minus cancel. 40 / 10 = the value of t becomes 4 seconds. This becomes our answer. Questions of this type come in the exam paper. Okay?

Now, son, whenever you are given any question, you have to see where the object is being thrown. If the object is going downward, then you have to keep all these things in mind. If the object is being thrown upward, then like this, brother, we have this ball. Isn't it? I have this ball. What did I do to this ball, son? I threw this ball upward. What did I do to this ball? I threw it upward. When this ball is going upward, upward , upward , at that time, when this ball is going upward, at that time what will be the directions of its initial velocity, final velocity, acceleration, and displacement? Look, son, it is a simple thing. It is a simple thing. Remember this Cartesian plane, son. It is going upward. So, son, when I threw it upward like this, what is the direction of its velocity? Upwards. So this becomes positive. Okay? Final velocity. Final velocity means, look, son, this is going upward, upward , upward, and at this point, what happens, son? It will stop here and then it will start going downward. Then, ma'am, it will stop later, so its final velocity should be zero. Why, brother? I am only talking about the upward movement. As long as my object is going upward, upward , upward , as long as the upward movement is happening, I am not talking about the downward movement. My object is going from below to upward, upward , upward . I am only talking about that much motion. It went from here to here, from here to its highest point. After reaching the highest point, then it will start going downward again. Then this case will start. I am only talking about that motion where it was thrown from here, went to its highest point, and I am only talking up to that point. So, son, look, after a point, it stops. For one very light second, it stops and comes back down. So, son, suppose I threw it upward with a speed of 2 meters per second. A point will come when its final velocity becomes what? Zero. Isn't it? It came here. It came here and stopped. Finished. Goodbye. Tata, gone, brother. Because after that point, the downward movement started, you see. Then this happened. I am only talking about the upward movement. So, son, when any object is thrown upward, please remember, what is the difference between the two? When an object goes downward, its initial velocity is taken as zero. But when the object goes upward from below, its final velocity is taken as zero. Acceleration is negative. Why, brother? Ma'am, now the object is going upward, so why are you taking negative? Going upward should be taken as positive. You are teaching wrong. Oh no, brother, when this object is going upward, tell me one thing. When this object is going upward, isn't the Earth's gravitational force acting on it? It is acting. When this object is going upward, isn't it? This object is going upward, upward. At this time too, suppose it is here. The Earth is pulling it towards itself. It is here. Even then, the Earth is pulling it towards itself. It is here. Even then, the Earth is pulling it towards itself. That is why it went up to a point and came back. The Earth said, "Come, come, come, come to my lane, come." Isn't it? Isn't it? The Earth is also like "Come to my lane, my dear." No, no, isn't it? The Earth is getting too frank. The Earth, brother, understand one thing. The object is here, somewhere. The Earth is always calling it towards itself. So the force acting on this object, on this object, is always acting in this direction, son. Whether it is going upward, whether it is going upward, whether it is going upward, but at that time too, the force that the Earth is applying on it, its direction is this. And the direction of the force is the same as the direction of acceleration. Therefore, son, we will always remember, what will this be, son? Acceleration due to gravity. Acceleration due to gravity, you see, the value of g will be negative. That is, in this case too, 9.8 meters per second squared or -10 meters per second squared. Okay? Where is our object going? Upward. Where is the displacement happening? This is its initial point. This is its final point. This is its initial point. This is its final point. It went upward. So what does the displacement become? Positive. And time will vary. Time will vary. Isn't it? How high did it go? So, brother, it will take less time to go up to here, and more time to go up. Isn't it? And so on. So time will vary, brother. Okay?

Now let's do one question, son, on upward movement. Let's do one question, son, on upward movement. What is the question? What do we have, brother? We have ground level. Isn't it? What is at ground level, brother? At ground level, we have a ball. At ground level, what do we have? A ball. From this ground level, what did we do? From this ground level, what did we do to the ball, son? Threw it upward. And after 6 seconds, that ball came down. Okay? What did we do, son? We, we from the ground level, we threw a ball upward from the ground level. It must have gone up to a point. Let's assume this is what? That is the maximum point. And after that, what happened, brother? After that, it came back down. It came back down. And for coming down, it took, isn't it? For going up and coming down, total time taken was 6 seconds. That means it took 3 seconds to go up and 3 seconds to come down. Okay? Good. Now we have to tell what was its velocity with which we threw it? What is its maximum height? So, brother, what do we need to find? Ma'am, I don't understand, what do we need to find? Look, son, listen to me. When I threw it, the velocity with which I threw it upward becomes its initial velocity. What does that become? What does that become? That becomes the initial velocity. The initial velocity must have been something that I gave it. Isn't it? I threw it from here. It has come back here. So, son, it will have some initial velocity with which it went up, with which I threw it, and we don't know what that is. We have to find that. We have to find that with which it was thrown upward. Okay? Come, we know that it will go up and when it reaches this point, this point, this point, when it comes here, at a point, when it arrives here, its final velocity becomes 0 meters per second. Why am I writing "square"? 0 meters per second. Okay? Good. Do we know anything else? Yes, ma'am, we know the value of g, isn't it, son? What will I take? I will take negative. Explained earlier. Okay. Good. Also, brother, they have not told us this. They have not told us what the height is here, have they? We haven't been told that either. We have to find that. We have to find the value of h. Basically, we have to find the displacement. We have to find h. And what else do we have to find? Isn't it? We have to find this and this. We have been given time, son. So remember, son, the time given is for the return trip, for going and coming. Right? So remember, son, the time is given as 3 + 3. It takes 3 seconds to go up and what does it take to come down, brother? It takes 3 seconds to come down. So, brother, it takes 3 seconds to go up and 3 seconds to come down. Remember that. Okay? If you make a mistake here, the answer will not be correct. Okay? So here I am writing 6 seconds. But I am breaking it as 3 + 3 and writing it. So that you don't make a mistake. Now, son, in the question that appeared in the paper, two things were asked. We have to find the velocity. Okay? We have to find the initial velocity and we have to find the height. So let's do one thing, son. There is a formula we have. Isn't it? We have a formula. A very simple formula. v = a very simple formula. v = u + at. v = u + at. Brother, I will use this formula. Do I know the value of v? Zero. Do I know the value of v? Zero. Okay? The value of u, son, I can find. Here I wrote zero. What is u? We don't know. So just write u as it is. Acceleration due to gravity -10 and what t should I take? Quickly tell. What t should I take, son? I will take t as 3 seconds. Okay? We have to take, son, 3 seconds. Because we have to find the velocity when it is going upward, so it took 3 seconds to go upward. So, son, here I will take the value of t as 3 seconds. Remember this. Now, son, from here, write zero as zero, son. Okay? u, son, plus minus becomes minus 30. Okay, son. I will bring the 30 over here. Of what? What? It becomes plus 30. So u, what did u become, son? Our initial velocity becomes 30 meters per second. This we had to find. This we had to find. And what else did we have to find? And we had to find the height, that is, the maximum height, that is, how high did it go from here to here, brother, when it reached here, up to what maximum height did it go? Brother, how can I find the maximum height, son? I can use the third equation of motion among the three equations of motion. v² - u² = 2as, right? Let me write it reversed. Shall I write it reversed? Write it reversed. Some children write it like that too. 2as = v² - u². Write it however you like, brother. My habit is to write it a bit like this. So I will write it like this. Yes, you adjust. Brother, everyone has their own habit. Okay? What is this, son? This becomes our formula. So we have to apply here. What do we know? We know the value of v is 0. The value of u is 30. The value of 2 will be 2. Acceleration due to gravity is 10, and we have to find s. s means we have to find the height. We have to find the height. What can we do, brother? Remove the zero. What happens here, son? -900, 30 squared is 900. What is this, son? -20h. Brother, cancel the minus with the minus. 900 / 20 = h. Cancel the zeros. 2 goes into 90. h = 45 meters. If you don't write the SI unit, you won't get marks. I am telling you in advance. Okay, son? Come on, let's do one more question. Let's do one more question. There is a stone that was thrown vertically upward, and the velocity with which it was thrown upward, son, was 40 meters per second. Okay? What do we have to take? The value of acceleration due to gravity is to be taken as 10, and we have to find the maximum height. After that, we have to find the net displacement and total distance. Very simple, very easy question. But children get scared seeing this type of question because, ma'am, how to find so many things? Look, son, what is given? We have not been given anything. We have not been given any building. We have been given that, brother, we have a stone. What do we have, brother? A stone. Okay? We took the stone. We took the stone and what did we do with the stone, brother? Threw it upward. Took the stone and threw it upward. Okay? Now this stone went up to a maximum height. Went up to a maximum height, went. Okay? And reached there. Now we have to tell, what do we have to tell? First, brother, they have given that the velocity with which we threw this stone is 40 meters per second. Tell me, what do we know? We know that the initial velocity with which we threw it is 40 meters per second. We also know that it will come to a point and stop here. Isn't it? It will come here and stop, and as soon as it stops there, its upward motion ends because after that its downward motion will start. So v, son, is what? 0 meters per second. Okay? Do I know the value of g here? Yes, which I will take as negative. Remember, son. Okay? Good. Now, what do I need to find here, brother? I need to find h. I need to find. After that, let's see what is to be found and what is not. Brother, I need to find, what is h? How high did it go, brother? Brother, this is its initial point. This is its final point. What is this? Initial point. This is its final point. So, brother, from here to here, what will be its height? I have to find its displacement. So basically, brother, if I find the displacement from initial point to final point, what is that, brother? If I find the displacement, I will get the height. Brother, what can I do? Brother, I can use a simple equation. I can use a simple equation. v² - u² = 2as. Do I know the value of v? Yes, I know. Do I know the value of u? Yes, I know. So put it, brother. Then u, the value of u is 40 squared. Write 2 as it is. Acceleration due to gravity is -10, and this s means we have to find the height. We have to find h. From here, what does this become, brother? Minus minus 1600, -20h. Minus minus cancels, 1600 / 20 = h. What does it become, brother? Cancel zeros, 2 goes into 160, half of 160 is 80. So the height, son, the height up to which it went is 80 meters. So when I threw this ball, when I threw this stone upward with a speed of 40 meters per second, it will go up to a maximum of 80 meters, and after that it will come back down again. Brother, one question has been asked in a very tricky way. Three things: what has been asked? Maximum height? So maximum height, son, where it goes upward is 80 meters. Then they asked us, brother, how much distance did it cover? What mistake do children make? They do 80 + 80. Brother, they did not even say that it came back. Look, read the question: "A stone was thrown vertically upward. With this velocity, take the value of g as this, and find the maximum height up to which the stone went." After that, the story ends, brother. They did not say that it came back. There was no mention of the return journey at all. So, brother, how much total distance did it cover? It went up to the maximum height, that itself is its total distance. It reached from here to here. The height it covered is its total distance. So what does this become, son? 80 meters. Now the question also asks: tell what is its displacement? Brother, it went from here to here. This is its displacement. This is its displacement. Now, in straight line motion, the distance and displacement are the same. So here, son, the answer for all three things is 80 meters, which many children get wrong. They take the total distance of both the upward and downward journeys and the answer becomes wrong. So, brother, these are small mistakes that you need to watch out for, son? You need to be careful, specifically, son. Until you, until you pay attention to these sign conventions, to these positive and negative directions, the answer will not come. Brother, I am teaching things very comfortably, son, and I want that you also do some things. Brother, I am giving you this question as homework, and until, son, until you try questions on your own, son, it cannot be done. So we will find the answer to this question in the chat, son, with full honesty. You, son, meaning please comment and tell me what answer you are getting. Okay, son? Let us now move on, son, to our next topic. Okay? To the next topic, which is mass. We have also studied about mass in the Force and Laws of Motion chapter. So you will remember, son, what we studied there? We studied there that mass means the amount of matter present in a body. Any object, any body, how much "stuff" is there inside, brother? How much matter is inside it? The measure of that, the measure of that, what do we call it? The measure of that, we call it mass. Okay? "Mam mass," isn't it? It is a South Indian movie reference, guys. I don't know if you will understand it or not. But in childhood, a movie used to come on Set Max. Isn't it? What do you know, son? You are the new generation. A movie used to come on Set Max. Isn't it? There used to be a hero. His name was Mass, and there was a song "Mamma Mass." "Mam mass," isn't it? So stupid. So poor joke. Let's go back to the topic. So here, son, here, son, what is mass? Mass means how much matter is there in any body? In any object, in any body, how much matter is there, its measurement, its measure, we call it mass. For example, son, suppose in front of you, there are two glasses. Isn't it? One glass is this, one glass is this. Isn't it? One glass is half full, one glass is completely full. Now I ask you, tell me, which one has more mass? Which one has less mass? Then you will say, ma'am, this one has less water, so its mass will be less. This one, this one has more water inside it, so inside it, what will happen? Inside it, more, its, its mass will be more. Right? So, brother, this one is half full, so let's say its mass is 1 kg. This one is completely full, so let's say, brother, its mass is 2 kg. The one with more matter, the one with more stuff, what does that become, brother? That becomes the one with more mass. Okay? Here, look, brother, we have this truck. This is a truck. In one truck, what is there, son? In one truck, there is this much fruit, and in this truck, there is more fruit. Which one has more stuff, brother? Ma'am, this one has more stuff. Which one will have more mass? This one will have more mass. For example, brother, let's say its mass is 1000 kg, so what does this one become, son? This becomes 2000 kg. Right? So how much matter is there in any body, in any object, the measurement of that we call mass. What is its SI unit, son? kg. And the most important point, son, which I emphasized last time, I am doing again. Brother, the mass of any object, of any body, it remains constant. It does not change. You will also get questions like this, son. Isn't it? You will get questions later. They will say:

There is an object, there is a body. Its mass is 60 kg. Now tell me, what will be its mass on the moon? And children, I don't know what math they start applying. I don't know what kind of equations they start applying. Brother, nothing will happen. It will remain the same. Written like good children, right? Mass remains constant. So, if the mass of something, of an object, is 60 kg on Earth, then it is also 60 kg on the moon, right? 60 kg on Mars too, 60 kg on Jupiter too, 60 kg on Saturn too, brother, it will not change. If, son, I said about this pen on Earth that the mass of this object, of this pen, on Earth is 1 kg, then son, I will also go to the moon. There too, its mass will remain 1 kg. Mass does not change. Mass remains the same. But, ma'am, we have seen reels where it is said that if the weight is this much here, then it will be that much weight on the moon. What is weight, guys? Weight. Yes, ma'am, weight. That which is done on the weighing machine. So, child, listen to me. Today I will tell you some things that will sound a little strange to you, but it's okay, son. We often learn some things in childhood, and when we learn their reality, we learn the correct concept, it takes some time. It feels awkward to learn that new concept. There is a little lack of acceptance, but son, we are studying physics, brother, right? Knowing and understanding the right things is very important. So, I hope, son, you have understood the concept of mass from here. How much matter is present inside any body, that is its mass. What is weight, ma'am? Weight. What is weight? Weight is a type of force, son. What are you saying, ma'am? Weight is a type of force. Yes, weight is a type of force. Like there are different types of forces, right? Gravitational force, buoyant force, frictional force, right? There are many different types of forces. Similarly, weight is also what? Weight is also a type of force. No, ma'am, you are lying. No, brother, it's true. This is the truth. What is weight? Weight is a type of force. When any object, any body, right, is applying it on Earth. Right? Any object, any body, due to its mass, the force that is applied on another object, the force that is applied on another body, right? Due to its mass, the force that is applied on another object, we call that force weight force. Now, this will sound a little awkward to many children. What did I say? What did I say? I said, what did I say? I said weight is a type of force. Weight is a type of force. It is denoted by W. First thing, first thing, right? It is denoted by what? It is denoted by W. W means weight force. It is a type of force. If it is a force, then what will be its SI unit? Its SI unit will be Newton. Now, ma'am has used a term here. The force applied due to its mass is called weight force. Now, many children might not have understood this. But weight, let me give you an example. Son, suppose I am standing here right now. Right? I am standing here right now. On the ground, I am standing. So, right now, Earth is pulling me, right? Towards itself. Earth is applying a gravitational force on my body and pulling me towards itself. Right? And I am also what? What am I doing? I am also pulling the Earth towards myself. Right? I am also pulling the Earth towards myself. Equal and opposite, that force is. Okay? Everyone knows this. Okay? Good. Now, son, can I say that, brother, my body is applying force on the Earth? Can I say this? Yes, ma'am, you can say it. If the Earth is applying force on you, then you are also applying some force on the Earth. We completely agree with this. We have learned this in the Universal Law of Gravitation. So, I hope all children agree with this that when ma'am is standing here, ma'am is applying some force on the Earth. We call that force weight force. But ma'am, how can we believe it? Okay, brother, don't believe it. Suppose, son, instead of Earth, right? Instead of the ground, I stood on this balloon. Right? Oh, ma'am, as soon as you stand on it, this balloon will burst due to your weight. Got the point? Tell me, son. As soon as I stand on this balloon, what will happen? Ma'am, it will burst. Why? Because, ma'am, your weight, your weight, you will stand on it, ma'am. You are 50 kg. Not 50, 54. Why? Okay. So, son, as soon as I stand on it, due to my body's mass, due to my body's mass, what will happen, son? A force will be applied on it. Due to my body's mass, a force will be applied on it. And what do I call that force? Weight force. What do I call that force? Weight force. So, if I am standing on this balloon, what am I doing, son? Applying force on it due to my mass. So, if, son, I remove the balloon, I am standing on the ground. I am standing on the ground. So, due to me, right? Due to me, due to my mass, the force that is applied on the Earth, we call that weight force. Okay? For example, son, suppose this is an object. Suppose, son, this is an object. The mass of this object, right? The mass of this object, what did we say, son? 50 kg. What did we say? This is an object. And what is the mass of this object? 50 kg. So, this 50 kg object, this 50 kg object, son, the force that it is applying on the Earth. Right? This 50 kg object, son, the force that it is applying on the Earth, we call that force weight force. What do we call that force, son? Weight force. And the weight force, son, it depends on two things. One, what is the mass of that object? Right? What is the mass of that object, brother? This 50 kg. The mass of this 50 kg object is what? 50. And, son, what is the acceleration due to gravity there? What is the acceleration due to gravity there? That is, what is the value of g there? So, son, the formula for weight force is mg. The formula for weight force is mg. Son, you can find the weight force of anything. If you know the mass of the object and you know the acceleration due to gravity. So, if I ask you, brother, this is an object. It is the same object whose mass is what? Whose mass is 50 kg. Tell me, how much force is it applying on the Earth, brother? Like I am standing here. Right? I am standing here. Right? So, I am applying some force on the Earth. Similarly, brother, this object is lying on the Earth. Right? The object is lying on the surface. So, how much force is this object applying on the Earth? How will we calculate it? Brother, the weight force it is exerting, the weight force that will be here, son, will be equal to mg. mg means its mass and its acceleration due to gravity. Brother, what is the mass? 50. What will be the value of acceleration due to gravity on Earth, son? Roughly, son, it is 9.8. Right? We round it off, brother. We take 10. So, son, this object is applying a weight force of 500 Newtons on the Earth. When it is lying here, this 50 kg, this 50 kg object, son, is applying a force of 500 Newtons on the Earth. Just lying there. Okay? Now, if I ask you, suppose, son, I am 60 kg. You were 54 kg earlier. How did you become 60 kg? Right? Suppose. Right? Suppose, brother. Right? This is Samriddhi Ma'am. Ma'am's hair has been made. Ma'am's hair has been made. Right? Samriddhi. Oh my god, scary Samriddhi Ma'am. Ma'am, where did your hands go? No, right? So, son, this is me. Right? And I am standing on the ground. Right? I am standing on the ground. So, brother, my body, right? My body, the force that it is applying on the Earth, we call that force weight force. And ma'am said, ma'am is 60 kg. Actually, I am 54 kg. I am telling the truth. I am not lying. Right? It might have even reduced. Right? Girls, we won't tell our age and weight now. Right? Yes. Actually, that is not weight, that is mass. Okay? Now, what is weight? Look, brother, what is weight? Brother, ma'am said ma'am's mass is 60, and what is the acceleration due to gravity on Earth? 10. So, son, at this time, when ma'am is standing like this, right? When ma'am is standing like this, she is applying a force of 600 Newtons on the ground. Okay? It is 600 Newtons. Understood, son? So, you can find the weight of anything like this. Simply, you need to know its mass, and you need to know the acceleration due to gravity. Okay? So, son, its formula is this. What will be the SI unit? Because it is a force, so what will be the SI unit? It will be Newton. Weight is a force, so its SI unit will be Newton. And on what does it depend, brother? On acceleration due to gravity. And on what does it depend, brother? On acceleration due to gravity. Right? On what does it depend? It depends on acceleration due to gravity. Okay? And the weight, son, on the moon is 1/6th of the weight on Earth. What is this, brother? What is this? Look, son, earlier we saw a simple, right? Earlier we saw a simple relationship: brother, the acceleration due to gravity of Earth is 9.8, and that of the moon is 1.6. Right? So, it is approximately 1/6th. Approximately 1/6th. The acceleration due to gravity on Earth, only 1/6th of it is found on the moon. Right? And with the help of that, right? With the help of that, I can derive another relationship here. We have already derived a relationship. What is it? That if I find the acceleration due to gravity of the moon. What is its relationship with the acceleration due to gravity of the Earth? This is the relationship. Okay? This is the relationship. I will do one thing. What will I do? I will add m on both sides. I will add m on both sides. Right? I will add m on both sides. So, what did I do here, son? Do I see m or not? Yes, I see it. I added m here. Okay? And here I wrote: acceleration due to gravity on the moon is equal to I added m here, right? I added m here, and what did I do, brother? I wrote acceleration due to, right? I wrote this as it is. Acceleration due to gravity on Earth, and below it became six. Now tell me, brother, what is this? mg. mg. Mass into acceleration due to gravity, what is it? Ma'am, that is weight force. So, weight force, brother, mg. Brother, tell me one thing, weight is equal to mg, right? Weight is equal to mg. Right? mg, mg. So, what is the weight on the moon, son? It is mg, mg. So, what happened, son? Weight on the moon is 1/6th of the weight on Earth. 1/6th of the weight on Earth. Meaning, meaning, brother, anything, anything, you calculate the weight of anything on Earth and on the moon. On Earth and on the moon, then its, right? So, on the moon, son, its weight, on the moon, son, its weight will be only 1/6th of its weight on Earth. Okay? We have learned a simple thing, brother. We have learned a simple thing. Weight is equal to mg. Mass never changes. If the mass is 60 kg on Earth, then it will also be 60 kg on the moon. But on the moon, son, the value of g will be different. On Earth, son, the value of g on Earth is 9.8 meters per second squared. But on the moon, son, the value of g is 1.6. So, now, tell me one thing, brother. The value of m is not changing anywhere, right? The value of m will remain the same wherever you go in the universe, right? But the weight, son, will change because if you calculate it on the moon, you will take 1.6 here. But if you calculate it on Earth, you will take 9.8 or 10 here. Right? So, son, the entire value will change because of that. The entire value will change because of that. Understood, brother? If you want to find the weight of anything, you need to know its mass, which is what, son? It always remains the same. Wherever you go. What changes, son? What changes is this value of g. On Earth, you will multiply by 9.8. Right? Suppose, son, I give you a, right? Yes, suppose I give you an example. Suppose, son, 10 kg, right? 10 kg thing. 10 kg mass. If you calculate its weight force on Earth, brother, how much force is it applying on Earth? Then you will multiply it by 9.8. But if you, right? Suppose this was Earth. Now I am calculating on the moon. So, what will you do? You will multiply it by 10. By what? By 1.6. So, brother, the values will be different in both, won't they? The values will be different in both, and because of this, son, questions are also asked in exams, right? Because of this, son, questions are also asked in exams. I will come to these questions too. But here, son, to give you a little reference, right? To give you a reference, son, suppose our, suppose, brother, ma'am's weight. Ma'am, ma'am, sometimes 50 kg, sometimes 75 kg. What are you doing, ma'am? Decide. Okay, let's decide. 50 kg. Okay? Neither yours nor mine. Ma'am, ours is less than yours. Right? Suppose, son, there is a body, its mass is 50 kg. Okay? So, on Earth, son, its weight force will be 490 Newtons. The same 50 kg body, son, if it goes to Mars, where the value of g is 3.7, then it will become. This is not even in our syllabus. But if we look at the moon, then what will happen, brother? On the moon, right? On the moon, what will happen, son? You will multiply the same 80 by 1.6, so the weight force there will be less. So, what it means is, friends, weight force varies and on what does it depend? On acceleration due to gravity. Okay, son? I am coming to the questions. Look, the question is: questions of this type come. Okay? There is an object whose mass is given as 60 kg. So, brother, we have already understood. Mass is 60 kg. What do we need to find? The mass of that object on the moon. It remains the same. First of all, son, anywhere you are asked the mass of something, it remains the same. It will remain the same, whether it is on the moon or in China. Right? Whether it is in Chandni Chowk, or on Saturn, or on Pluto, anywhere, it will be 60 kg. Okay? The mass, son, on the moon will be 60 kg only. How to find the weight on Earth and weight on the moon, brother? We know, right? How to find the weight on Earth? m * g. m * g. So, how to find the weight on Earth? Son, what is the mass? 60. What is the value of g, son? Let's take the value of g as 10. Okay? So, son, what will be the weight on Earth? 600 Newtons. 600 Newtons. How to find the weight on the moon, brother? There are two ways. Right? Either, son, with the moon's, with the moon's acceleration due to gravity, 1.6. Or, brother, the relationship I told you earlier. Right? You can do it directly. Like this, if we don't know, if, brother, some child doesn't know, then I have told you that it exists. Okay? But, son, the method given in our NCERT, brother, is this: we know that the weight on the moon is only 1/6th of the weight on Earth. Whatever the weight on Earth, 1/6th of it. So, that is, the weight, right? The weight, son, on the moon, I am writing m for moon. The weight on Earth, son, is what? 600 divided by 6, what is it, son? The weight force that will be applied on the moon, son, will be 100 Newtons. Okay? Like this, you will, son, practice questions like this. Okay? Questions of this type come. The difference between mass and weight is asked. If the difference between mass and weight is asked, then we will tell, son, how much amount of matter is present in an object, that is its mass. And the force that is being exerted, son, right? Gravity is pulling us down, and due to that, we are being pulled down, we are being pulled down, and when we are being pulled down, we are applying some force downwards. We call that force weight force, son. Right? Its symbol is small m. Its symbol is capital V. Capital V, no. Capital W. Again, a movie reference. There is a movie, right? Why am I telling you? There is a movie, "Dhamaal". Yes. The original "Dhamaal", the first one. In Goa, in a Sands Western Garden, they have to find a big W. So, there he does like this, W, W, W, right? So, W means weight. Weight means force. Weight force. Okay? Its SI unit is kg. Its SI unit is Newton. Brother, does the mass of anything depend on gravity? No. It depends on how much matter is inside it. So, it does not depend on gravity. Brother, it depends on gravity. Brother, it depends on acceleration due to gravity. This is a scalar quantity, son. This is a vector quantity because it is a force, so obviously, guys, it will have a direction. Okay? And, son, when we talk about mass, it remains constant. But weight force changes. Right? The acceleration due to gravity on the moon is different. On Earth, it is different. On Mars, it is different. So, everywhere, son, the same body will exert a different weight force. I, weighing 50 kg, will apply a different force on Earth and a different force on the moon. Please, someone send me out of the solar system. I will go there and see how much force I will apply. Okay? So, I hope this, son, is clear to you. Okay? Similarly, son, look, a question can also come to you like this. Right? Like here, it is given that the gravitational force on the moon is what? It is only 1/6th. Okay? As strong as the gravitational force of Earth. It is saying, brother.

The value of gravitational force or acceleration due to gravity, which is 1/6th of Earth's on the Moon. So, you have to tell that there is an object whose mass is 10 kg. Okay? Okay? So what do you have to do with it, brother? You have to find its weight on both the Moon and Earth. Brother, weight on Earth will be equal to mg. Weight on Earth. What is the mass? 10. What is the acceleration due to gravity? 10. So what is it? 100 Newtons. Formula for weight on Moon = weight on Earth / 6. What will you do, brother? What will be the weight on the Moon? On Earth. Okay? Calculate the answer from here. What will come? 16 something will come. Okay? 16 something will be the answer. Okay? So, check that, son. In this way, you have to answer. Okay? Check that, son. It is possible that my calculation was wrong, but check it. In this way, the answer will come. Okay? Come on, son. Now, some application-based questions of this type also come here. What is the question, son? It's a very interesting question. It's an NCERT question. Okay? What is the question, son? Amit buys a few grams of gold at the poles as per the instructions of one of his friends. He hands over the same when he meets him at the equator. Will the friend agree with the weight of gold? But brother, the first thing is that gold is becoming so expensive. Right? What is the rate of gold? I saw it this morning. Approximately 1448 rupees per 10 grams. It has become very expensive. Right? Absolutely no risk, guys. Absolutely no risk. Right? We will measure it completely. So he is saying that brother, he bought a few grams of gold where? At the pole. What did he buy, brother? What did he buy, brother? At the pole. What did Amit ji do, brother? Amit ji went to the pole. Right? And what came to his mind at the pole. Right? He bought gold there. Right? He bought gold there. Where? We are talking about weight. And, right? We are talking about weight. Weight is a type of force. Right? The weight at the pole will depend on what? On its mass and acceleration due to gravity. Guys? Do you remember? Do you remember? This acceleration due to gravity at the pole, what is it, son? Tell me quickly, is it more or less, brother? It depends on the radius, remember, brother, remember quickly, apply the concept, remember quickly, brother. Acceleration due to gravity depends on the radius. Acceleration due to gravity depends on the Earth's radius. Where the radius is less, there the acceleration due to gravity is more. So at the pole, son, acceleration due to gravity will be more. So therefore, at the pole, at the pole, weight force will be more. Weight force will be more. Right or wrong? Formula for weight is mass * acceleration due to gravity. At the pole, at the pole, at our pole, son, the radius is less. Radius is less, so acceleration due to gravity is more. And if this is more, then this is also more. So, son, the weight force will be more at the pole. The weight force will be more at the pole. But now, if we do what? If we do what, brother? If we compare it. If we do what, brother? Compare it with what? With the one at the equator. Right? When he met him at the equator. What will happen at the equator, brother? What will happen at the equator? At the equator, this radius will be more. Okay? At the equator, this radius will be more. So the weight at the equator, right? The weight at the equator will depend on two things. Mass and what is the acceleration due to gravity there? Brother, what is the acceleration due to gravity there? It will depend on two things. One is mass and radius. Brother, what is the radius here? What is the radius? The radius here, son, is more. So the value of acceleration due to gravity will decrease here. This will be less, son? Less. And if this is less, son, right? If this is less, then the weight force will decrease. Weight force is less at the equator. So, son, so, son, what did we understand from here? Here, son, that value will be more, and here that value will be less. And the friend will say, brother, so the friend will say, brother, where is my remaining gold? There he will say, brother, when I took the reading there, it was coming more because the value of G was more there, but here the value of G is less. So the readings will not match, and there will be a fight between friends. Clash, clash, right? Okay? So in this way, we will write the answer that brother, the friend will not agree, right? Such expensive gold and its weight is getting messed up. Right? So, brother, no, the friend will not agree because, because what, brother? Acceleration due to gravity is more at the pole. Due to which, the value of mg will be more there at the pole. But at the equator, son? At the equator, it will be less. Okay? And we will write the whole story like this that brother, there will be an argument, brother. There will be a clash, brother. Okay? With this, we come to the last section of the chapter, where, son, we will look at some small topics, and here, son, not many numericals are formed on the topics we are going to study, we are going to see. So far, we have studied the Universal Law of Gravitation, we have seen numericals of acceleration due to gravity. Apart from that, son, we have seen numericals of free fall, which are mainly asked. Brother, this is the main part from where numericals come. Thrust, pressure, etc. Right? You will get some analytical questions on pressure. Right? Like why are the walls of a dam thick at the bottom, or why are the straps of a bag thick? Questions of this type will come. But numericals are few. And after that, son, we have a topic of buoyant force, which is only theory, and its numericals are asked in the 11th grade. Okay? Archimedes' principle is also there. Its applications are asked. And one more thing, the theoretical part is more left. Okay, son? So let's study, son, let's understand what? About thrust. Thrust does not mean feeling thirsty. I'm telling you beforehand. Okay? So how do you know? We were thinking this because when I was young, I also used to think such silly things. So it's completely fine. See, it's a very simple thing. You will understand it very easily. See, son, we are applying force on something. For example, let's assume, brother, there is a wall in front of me. Right? Let's assume, son, there is a wall in front of me. What am I doing? I am pushing this wall like this. I am pushing this wall. So the force that I am applying, the force that I am applying. Let's assume, son, I am applying force like this. What am I doing, brother? I am applying force on it in this way. Son, at what angle am I applying this force? See, the wall is like this, the wall is like this, the object is like this on which force is being applied. And I am applying force on it like this. So, son, the angle between my force and this object is how much? 90 degrees. How much angle is formed, brother? 90 degrees. So, son, when we exert force. Right? When we exert force and at what angle did we exert the force? At 90 degrees, then we say, brother, we have applied thrust. You came and told me, son, guess what I did today? Tell me, what did you do today? I said, I applied thrust on the wall today. So you will say, ma'am, what is this? Oh, brother, I told you, when the angle is 90 degrees, when the force is applied at a 90-degree angle, that is called applying thrust. When force is applied at a 90-degree angle, that is called applying thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we, right? So when we stand on the ground like this and what are we doing, brother? When we are doing what, brother? We are applying weight force, tell me quickly, brother, this is weight force, isn't it? This is weight force, isn't it? I am applying weight force, mg. Oh brother, mg is weight force, isn't it? It's a type of it. So, brother, when we apply weight force, that is also a thrust, when we apply force at a 90-degree angle. When force is applied at a 90-degree angle, that is called thrust. For example, brother, let's assume, right? Now think like this. Right? Think like this, son. Let's assume you are standing on the ground right now, so the ground is an object for you. What are you doing? You are applying force on the ground. Now, son, it's not like you are standing crooked like this. You are standing like this, right? It's not like this. Right? It's not like this, son. Right? You are not standing crooked. You are standing like this, brother. So when you are standing like this, son, then the angle formed between you and the ground, son, your force is applied like this. You are exerting force on the ground in this direction. So the angle formed here, the angle formed here is 90 degrees. So, son, when we,

It went all the way down. Okay? But when we placed it like this, stood it up like this, then brother, it went so far down. Why is that? Because in this case, in this case, more pressure was applied. Why brother? Because in this case, in this case, son, the area in contact was less. The area of contact is less, so the pressure is more, and because the pressure is more, it sank more. What is in this case? The area in contact is more, so the pressure is less. Less pressure is being applied, so it is sinking less. And in every question, son, almost the same thing will be asked: that a person is wearing, has worn heels. One is wearing these shoes, brother. Tell me, who is exerting more pressure? Or it is asked that when wearing high heels, so much pain is felt because, look, here, son, so much of the shoe, this whole part is in contact, this whole part is in contact, so in this case, brother, the area is more, so the pressure is less, there will be less pain. But look here, son, only a small heel, a pencil heel, and the front part are in contact. The area in contact is small, so more pressure will be felt, high pressure. Similarly, son, questions come up like you have a dull knife. Right? And a very sharp knife. Brother, the sharper, the thinner the knife, right? The more pointed, the thinner it is, right? The sharper it is, meaning the area is less. The less the area, the more the pressure. That's why, son, fruits and vegetables are cut very easily. But if the knife is dull, brother. Right? Meaning it is not sharp, not thin, right? Then, son, the area increases, the pressure decreases. That's why, son, there is difficulty in cutting fruits and vegetables. The same thing, son, you must have noticed at home. Mom said to water the plants, right? Stood there with the pipe. Oh, the water is coming very slowly. There is very little pressure, Mom. What to do? What to do? So you said, I'll do one thing. I'll press its mouth like this. And as soon as you press its mouth, son. Right? The front mouth of the pipe, as you press it. Its mouth became smaller. The mouth became smaller. Meaning the mouth became smaller. Meaning, brother, its area became less. And as soon as its area decreases, its pressure increases. You must have seen, son, when you press the pipe like this, the water goes forward with a lot of pressure because its area is less. Less area, more pressure. And similarly, son, right? When you haven't pressed its mouth, at that time, comparatively, the area is more, and the pressure is less. A question comes in the paper: why are the walls of a dam made thin at the top and thick at the bottom? The walls of the dam, son, right? Are very strong. Are very strong, right? So you know about dams, brother, where water is stopped. A lot of water is stopped. Then it is thrown down like this, then the turbine rotates. Oh, we will read about work and work, right? We will read in the work and energy chapters, son. Right? So, son, a lot of water is collected inside it. So, son, the pressure of water is less at the top, and the pressure of water is more at the bottom. To withstand the high pressure of the water at the bottom, the walls are made thicker at the bottom. Why are they made thin at the top? Because the pressure of water is less at the top, so even a thin wall can withstand it. But the pressure of water at the bottom is very high. That's why, son, the wall of the dam is made very thick at the bottom. Questions like this will be asked, son. Okay? Okay? Now look at this type of question, son. Like this, there is a man. Okay? He will exert the same pressure on the ground, whether he is lying down or standing up. This is completely wrong. If he is standing, he will apply more pressure. He will apply more pressure. Why? Because pressure is inversely proportional to area. When he is standing, son, the area of contact is less, so more pressure will be applied. When he is lying down, what is it, brother? Less pressure will be applied. So, remember this, brother. This is the only important point here in every question, son. Pressure and area are inversely proportional. Remember this. Pressure is inversely proportional to surface area. This is correct, brother. This is wrong. A False R True. The answer is option D. Okay? Or questions like this: why are school bags, right? If they have thin straps, thin straps. Right? Now tell me, if someone tells you, brother, this is a thin rope, a very thin rope, but strong. It won't break. Would you prefer to carry a bag like this? No. Right? Why? Because the area is less, son. A thin rope, less area. So you will start feeling pain here, son, because the pressure will be more. Less area, more pressure. That's why they say, brother, when you buy a bag, buy a bag with wide straps because the area is. Because the area is, son? Because the strap is wide. This strap, son? It is wide. The area will be more, so you will feel less pressure. This is what is written here. And now we come to, son, a very last small topic called pressure in fluids. Now look, we just read and understood what pressure means. What are fluids? We know that. Fluid means, ma'am, like solids, liquids, gases. So, ma'am, liquid means fluid. Many children think this. Look, son, fluid means. Fluid does not just mean fluid. Fluid does not just mean water. Fluid does not just mean liquid. Fluid is called anything that can flow, that can move. Right? Anything that can move. Like, brother, if I pour water into this. Right? And make a hole here, then the water will flow out. It is flowing. Right? So, son, all, right? All our liquids, all our, son? Liquids are counted under fluids. And is it only liquids that flow? Doesn't air flow? Don't gases flow? Don't they go from here to there? Don't they flow? They do too. So, actually, son, both our gases and liquids are called fluids. Remember this, brother. I know it sounds strange at first, because we always hear fluid means eat fluid things, drink fluid things, right? Brother, we always associate fluid with liquid, but gases are also fluids. Okay? They are fluid in nature. And solids. Solids are brother, rigid. Solids are rigid in nature. Right? Now, if someone asks, brother, look, solid, solid, look, son. Now this is a ball, right? This is a ball, brother. This ball is lying here. It is not running around here and there. But, son, can I leave water like this? No. Water will run here and there. If I take gas like this. Then gas will run here and there, brother. It will flow. Why is that? Why is that? Tell me. Liquids and gases can flow. What is the reason? The reason is internal forces. Brother, we know, we read in the first chapter of chemistry, that the particles of liquids and gases, what do they do? They show movement. Right? They show movement, brother. The particles of solids vibrate in one place like this, like this, like this. Right? And the particles of water, the particles of liquid, move like this, like this, like this, like this. And the particles of gases, the particles of gases move like this. Right? We know this. So, there are some, what, son? There are some internal forces. They have, right? A capability. A capacity. Can we say, brother? There are some internal forces within them. Because of which they, brother? Show movement. Show random movement. And, son, suppose I take a fluid, for example, brother, I have a beaker. I have taken water in the beaker. And, son, what are these dots? To represent the water particles, what have I done, brother? I have made these dots here. Right? And we know, we know that the particles, brother? Like this, like this, like this, like this, like this, like this, like this, like this, right? They will go here, they will go there, they will go here. Brother, they show random movement, right? So, son, according to that logic, tell me one thing. This particle, brother, this particle is applying pressure on this wall. Tell me quickly. It will collide with this. It is applying pressure on this. It is applying pressure on this. It is applying pressure on this. It is applying pressure here. Here. Here. Tell me quickly. Is it like this, son? Yes. I don't have a water bottle, but it doesn't have water. But if I take water in this, then what will those water particles do? What will those water particles do, brother? They will exert pressure on its walls. Right? And that pressure will be in all directions. Brother, it's not like it will be in only one direction. It will be in all directions. These water particles are applying pressure on its walls in this direction. From here, brother, they are applying pressure on these walls. Right? They are applying pressure downwards on this, right? They will collide with them. They will collide with them, so what will happen here? Pressure will be exerted here. Right? Yes, ma'am. Right. Now, son, tell me one thing. Right? The particle is applying pressure here, here, here. So, brother, the particle shows random movement. The particle shows random movement. So, brother, if the particle is moving like this and like this, then the particle, brother, the particle must also be moving upwards. Right? It must also be moving upwards like this. Now, son, imagine. What have I done? What have I done? What have I taken here? I have taken an object here. Suppose, son, inside the water, what have I done? I have placed an object here inside the water. Right? I have placed an object here inside the water, son. Right? Now, tell me one thing, son. Think a little and tell me. Think a little and tell me, son. This particle, brother, this particle is going this way. Sometimes it collides here. Sometimes it collides there. Sometimes it goes down. So this particle will also come up. Yes, ma'am, it will. Same thing, it is going this way. Going this way. Going this way. And, son, when it comes up, don't you think it will apply pressure on it? It will apply force on it. Don't you think, son, when it collides with it, it will apply force on it? Brother, when it collides here, force is applied on its walls. Pressure is applied on its walls. When it collides here, force is applied on its walls in this direction. So, now tell me one thing, brother. Tell me one thing, brother. When it, right? When it collides with this, then on this object, on this object, a force will be applied, right? When it collides with this, a force will be applied on this object. Yes, ma'am, it will be applied. So you are saying correctly. Will it be applied or not? Yes, ma'am, it will be applied. It will be applied, brother. Absolutely. When they move upwards, son, a force will be applied on this object. Yes, it will be. It will be. It will be. This force is called. First, tell me, in which direction is this force applied? Our fluid particles are applying force on this object. Yes, ma'am, they are. When they are moving upwards, they are applying force upwards. What is the direction of the force? Upward. Who is applying it? Fluid. That's what is called buoyant force. That's what is called buoyant force. When any fluid applies a force on an object in the upward direction. That force is called buoyant force. I will repeat again, son. I will repeat again. What did we study? We studied that when we take any fluid inside any container, right? When we take any fluid inside any container. Then fluids, son? Fluid particles always, right? Always here and there, everywhere. It's not that it's only in one direction, they move randomly. They collide here and there. Due to colliding here and there, force is applied, and if force is applied on a unit area, then pressure is created. Right? Pressure is created. So, what it means is that the fluid is, brother? Applying pressure here and there, here and there. Right? Colliding here and there. Force is applied. Force is applied on some area. So, what has happened here, brother? Pressure is being applied. We understood this. When these fluid particles apply force on an object in the upward direction. Brother, when they apply force upwards, upwards, brother? On an object, son, when fluid particles apply force on an object in the upward direction. That force is called buoyant force. Look here, brother. Look here. What is written here? Upward force exerted by a fluid on an object is known as buoyant force. Is known as is known as buoyant force. Right? What is it called, son? Buoyant force. It is also called upthrust. It is also called upthrust, or buoyant force. Right? It is denoted like this, FB. Sometimes capital B is written, sometimes small b is written. Force? Buoyant one. It is also called buoyant. Right? But I say buoyant. This is more of my pronunciation. Right? And our pronunciation somewhere depends on our teachers. Whatever our teachers say, that becomes the pronunciation. Right? Buoyant force. And who applies buoyant force, son? Fluid. Who applies it? Fluid. In which direction? Upward direction. On whom? If we have an object inside any fluid. An object inside any fluid is either completely or partially immersed. Then the fluid particles at the bottom will apply a force in the upward direction, and that force is called what? That force is called buoyant force. What do we call it, son? Buoyant force. Right? Okay. Now, there is a simple thing here, brother. Here it says weight, and here it says buoyant force. Okay, did you understand this, son? What is buoyant force? Buoyant force is an upward force that fluid particles, like water and air, apply. On whom? On the object placed inside them. Right? Because it is a force, so, son, what will be its SI unit? Newton. Son, the formula for this is not in your syllabus. I have written it here for you. Right? Here to make you understand that these things are in the initial stages. We are studying many things in the 9th grade in NCERT because we have to study all these things in the 11th. So this is an introduction, son. Right? A lot is left. A lot is left to study, brother. Right? So, look, son, this is the formula. Now you will say, ma'am, what is this? FB means buoyant force. What is this? This is called rho. Like, son, right? Like, son, this is alpha. This is beta. This is gamma. Similarly, son, this is called rho. Rho means density. Whatever fluid we are, right? Whatever fluid we are talking about, right? It will have some density. Every fluid has its own density. That's why I am not teaching it because it becomes a bit confusing for children. This is a formula, brother. Right? What is the density of the fluid? After placing the object in it, how much fluid came out? What is the volume displaced? g means acceleration due to gravity. And, brother, this is not in the syllabus. I am just telling you that there is a formula for this, but it is not in our syllabus. What is in our syllabus? What is in our syllabus is: why does any object float and sink inside water, son? Brother, I give you two options. Suppose, son, I have a beaker. What have I done inside the beaker? Inside the beaker, I took a plastic ball and an iron ball. Right? Right? I took a plastic ball. I took, brother? I took an iron ball. Now, if I ask you, son, tell me, what will float and what will sink? Then children will answer very quickly. Ma'am, the iron ball will, right? It will go down. It will sink. But the plastic ball will not go down. It will keep floating on the surface of the water. Right? Why is that? And when I ask the children, the children will also give the correct answer. They will say, ma'am? Because it is heavy. Right? Because what? It is heavy. What is its mass? Its mass is more. Right? Its mass is more. And its mass? Its mass is less. The point is correct. But, son, I ask you one more thing. I ask you one more thing. Think a little and tell me, son. Think a little and tell me. We studied a simple thing: when we place any object inside any fluid, then the fluid particles apply a force on it in the upward direction. They apply a force on it in the upward direction, and that force is called buoyant force. So, the particles here are applying force on it, and the particles here are applying force on it. Right? Will they apply? Yes. Right? Will they apply? Okay? Now, son, tell me. If this is the object, right? This is the object, son. If I place this object on the ground, it will exert a weight force on the ground due to its mass. Brother, if I weigh 50 kg, then I am exerting some weight force. If I go inside the water, brother, then I will also exert force on the water, right? Like, son, I was standing on this balloon. Right? So I was exerting force on this balloon. So, brother, wherever I am, I will exert force there. I will exert my weight force there. So, similarly, brother, this water, this plastic ball, son. It must also be exerting force on the water particles, brother? Tell me quickly. Tell me quickly. When two objects are there, they exert force on each other. Remember, son. If it is applying force on the water particles, then it must also be applying force on the water, right? Due to its mass, due to its mass, and what will that be, son? Will that be weight force or not? Brother, will that be weight force or not? Right? Will that be weight force? And will that be equal to mg? Will that be equal to mg? Tell me quickly. Tell me quickly. Will it be? So, water.