Hello everyone how are you guys I really hope you are doing well so the topic that we are going to cover today is related to physics and the topic is force and laws of motion and inside this we are going to do the first law of motion Let me tell you the first rule, Newton's force and law of motion. In this particular, we read Newton's three laws in this chapter. Let us introduce Newton's three laws. The first is related to inertia, the second is related to momentum, and the third is Our action r
eaction action reaction will have separate videos for all three so that it is not too much and you can read it quickly. If it is very short then you can definitely give your suggestions in the comment section as to what you think if If there are videos of so much duration , then you can cover more in a day, but if they do not have the same effect on other subjects, then we are going to bring this, so today you are going to study only one law and related to it. All the questions that can be made,
I have put them with explanation, so today's topic is that is Newton's first law of motion, Newton's first law of motion, now Newton had given three laws but there is something or the other in all the three laws. If you had told me a new thing, then first he will introduce the new thing and then try using it. In Newton's Law, the first thing that I have to teach you today is that inertia is engrossing. See, it is a matter of common sense, which perhaps I will ask you now. You will say, are thes
e children 's things, ma'am is telling me? Now I am saying that there is this pen in front of you and even a small child will pick it up if I tell him to pick it up, he will pick it up, he will pick it up right there, but if there is such a big rock there. I have kept the rock, okay is it a big block of marble, will I be able to lift it or will you guys be able to lift it? Will you not be able to lift it? Because what reason will you guys give? We will not find fault in it. We will say that it i
s too heavy. We cannot take such a big right, even science does not admit its mistakes. Simple, we have pointed out its shortcomings. Science will praise itself. Science will praise itself. Science will say that if I talk about science, that is, I am the perspective of the rock, the point of view of that rock. If I talk from the view, a simple point will come, Rock will say that I don't want to get up, no one can lift me, simple meaning, first of all, what I am telling you right now is inertia,
what does it mean, it is every object in the world. Every object, whatever it may be, every object tries to prevent change from taking place within itself, it is a simple thing, if I am saying, pick up this pen, you have picked it up, then this pen has also tried to stop itself from being picked up. I must have tried to stop it so that I would not be able to get up, but this is called inertia. Simple inertia means that if change is coming within me, I am trying to stop it. That is inertia. Now o
n what will it depend that I can stop it? Will I be able to find it or not? Just look at my own body. Science does not penetrate deep inside. Science is only material. If science can see the thing from above, yes brother, it is a very big thing, very strong thing, then it will stop there, brother, I. No, I will not push it further, it is okay but if you look at science, it is a light thing, that is, it will look from outside. If the weight of this pen was, say, 50 kg, would I be able to lift it,
maybe I would not be able to, right, but it has a few grams of weight. I picked it up. Inertia depends on mass. If something is heavy, then it has inertia. Understand that inertia means stubbornness. Its stubbornness will also be heavy. You will not be able to change it, but if it has less mass, its mass is less, then its If inertia is also less then what is inertia? Inertia is the habit due to which any object stops the change coming inside itself. If that object was moving then it would say t
hat I will keep moving, do not try to stop me if it If the object was stationary then it would say that I will remain stationary, don't try to move me, don't try to change me, but we can change it, that is, it will depend on what, how much mass is there in it, if it is heavy, we will not be able to move it, we will change it. We will not be able to do this, if it is light then we will apply so much force that its inertia will be broken, its inertia will be broken. Unknowing When things happen, w
hen we do not know, then the inertia of inertia keeps doing its work, we do not know. I am going to give you many examples of this, so let's first talk about inner property. It is that property of a body due to which it resists change in its state of rest and of uniform motion of any body. It is the property of a state of matter due to which it resists change in its state of rest or in uniform motion. It will prevent it from bringing change in whatever state it is in. If it is a state of rest, i
t will resist change in it. If I am at rest, then I Do not move, if it is in uniform motion i.e. it is moving smoothly at a constant speed at a fixed speed, then it will say that even then there is no need to stop me or change it, neither can you change my speed. Do it, nor do you try to stop me. What is it called? Inertia depends on the mass of a body. It is important that what is the inertia it depends on. It depends on its mass. The greater the mass, the greater the inertia. The more it will
be, that is, brother, the greater is its inertia, so if you try to bring about a change within yourself, the more it will stop you or stop you, how it will not stop you, if you will not be able to lift something heavy, then basically your deficiency is science. He convinced himself that yes, it's okay, you don't have enough life to get up, but we are not pointing out your shortcomings, we are saying that he is too stubborn, that is why he doesn't want to get up, that's why because his Mass was m
ore. Mass was more, hence you will not be able to change it. Simple. Now why am I telling this experiment because SSC has asked 50 questions on this many times. Once, this picture was put that tell which property is demonstrated. What property are you showing? Once the prop was told and then it was told, tell me, ask, tell me why this happened. Look, if you want to demystify the inertia of inertia, you have to see the example. It is very easy. Take a glass, put a cardboard on top of it, a small
Put a piece of cardboard and a coin on top of it. Place any coin. Now if you flick that cardboard at a very high speed, you will notice one thing, try it, but there is a condition that whatever you flick, you will have to flick it at a very high speed. When you remove the cardboard, the coin should also go with it, but the coin does not go, it remains the same and falls inside the glass. Now Where did the inners come from inside it ? Listen, here is your glass, it is at rest, so the inertia insi
de it, the inners, is at rest, it wants to remain at rest, will remain at rest, then you have placed a sheet of cardboard on top of it, this is also It is at rest because it is kept in rest, hence it will also like itself that I am at rest right now and you have placed the coin on top of it . It was also at rest in the beginning, so there will be inertia inside it also in the state of rest i.e. what have you done to the rest now? Who did you flick? You flicked this cardboard. If you hit the card
board like this, then the cardboard was hit because the cardboard was very light. The cardboard was very light. Its inertia was broken. Inertia can be broken. There is only one small condition that either your force is very high. It may be more than that or its own mass should be so low, its mass should be so low that having or not having inertia is the same for you. The simple thing that happened is that when we flicked this cardboard, the inertia of the cardboard got broken but the rest of the
things did not. It won't break even a little. Inertia breaks only of that thing on which we are applying force. So when I touched it with my hand, only its inertia was broken. If these two beans remained like this, then it moved, it remained at rest, it remained at rest. So it will automatically fall down, then this happens in the other wise, if it was the case that there is no role of inertia, there is no role of inertia, then we had thrown the cardboard and if the coin touched the contact of
the cardboard, then the coin would also have gone. This does not happen, always keep in mind that if there are two or three things, suppose these are two objects which are mixed with each other, if you are applying force on it, only its inertia will be broken, instead if it has touched it, then it will not happen that its It will not always break if you apply force on it, only its inertia will break, only its inertia will break, so the question they ask here is that tell why this coin went down
because it had inertia of rest, its inertia remained the same if you did not apply force on it. There was inertia of rest inside it, there was inertia of rest from the beginning, so it remained the same, that is why it fell down when there was nothing below, that is why this is your experiment, so what is the conclusion, initially the card and the coin are in the State of Rest: Initially the card and coin were at rest. When you flicked it and pushed it, the card moved and the inertia of the card
was broken but the coin. It remained at rest because this is the inertia that whatever it is wants to remain as it is. Simple and if you had to apply force to make the coin move then you should have hit the coin also. This is your reason. Now let us talk. Types of Inertia: How many types of inertia are there? The first one is Inertia of Rest. Now you have read that if a thing is in a state of rest then it wants to remain in a state of rest. If anybody, if any object is in a state of rest it has
A Tendency to Be in the State of Rest Only It Resists a Change in Its State of Rest If the body is in motion, it wants to remain in motion. If you try to bring change, it will resist and stop you. Simple inertia of direction. There are three types of inertia of direction. You have not read this. You are going in one direction. If yes then there will be inertia in my body that if I am going in this direction then I will keep moving in this direction. If I try to change the direction then my body
will try to stop me but that is a different thing that we control our body ourselves. So because of this we can easily break our energy but you must have felt it at many places which you will read in the upcoming slides Newton's First Law of Motion Look Inertia was a completely brand new topic wasn't it but Newton had not explained inertia. There was something else in Newton's law. Newton's first law was that if an object is in inertia, it means that it is trying to remain as it is, it will rem
ain the same. If the object has inertia of rest, then it will always remain at rest if the object has motion . If the object has inertia of direction then it will always be in motion. If the object has inertia of direction then it will always remain in inertia of direction. As long as you have understood the first law, I have told you through experiment, all that remains is to put it in words, until you go beyond that. You will not apply force, there is only one way to break the inertia, you app
ly force beyond it, then its inertia can be broken, it is a very simple thing and the force should be applied, the force should also be applied unbalanced. Unbalanced does not mean that inside my body. Suppose the inertia is 10 Newton, if you now apply 9 Newton to me, nothing will happen because I have the capacity of 10 Newton, so what will you have to do, if you have to apply more than 10, then if any object is in inertia, it is in inertia. It will remain the same unless an unbalanced force is
applied on it. Keep in mind that this law of motion is also known as Galileo's Law of Inertia. It is also called Galileo's Law of Inertia. According to this law, if something is at rest, then it will remain in that state. If an object is in motion, it will remain in motion. If it is moving in a straight line, it will continue to move in a straight line unless it is forced by an external unbalanced force to change its position. Nature of uniform motion unless you apply an unbalanced force on it.
You will apply because what will happen if you apply an unbalanced force? Inertia will be broken, so this was Newton's first law. As an example, suppose there is no obstruction, no friction, no force, then if you pedal on a bicycle, it will always keep moving, like a bicycle. It happens in space and there is nothing else, if you hit the pedal, it will keep moving, isn't it the inner thing that it likes to remain as it is, if you have to stop the cycle, you will have to hit the brakes, if even h
ere on Earth, there is no friction. It is okay if there is force and there is no air resistance. If there is no obstruction, then if you hit a puddle, the bicycle will continue to run at the same speed forever unless you hit the brakes. Unless you apply force on it yourself, let's stop this. Related questions and these same questions will be seen in the exam. If you understand then there is only one reason for all these, due to inertia. Next which inertia is of rest, of direction, of motion, you
guys will tell first of all when a carpet is beaten with a Stick dust comes out of it. Now look, this is a very simple example. This carpet is fine. There is dust on it i.e. your dust and soil. Now if these were lying then what would be the inertia in both of them? Quickly tell in the comment section which would be the inertia inside it. Were lying down, they would be having inertia of rest. There would be inertia of rest in them. There would be inertia of rest. Now you must have noticed one th
ing, there are sofas, there is carpet in the house. If you hit anyone with a stick, dust would fly from it. It will be visible, why look, they were lying comfortably, now what did you do, you brought a stick. And you hit the carpet very fast. Okay, so as soon as you hit the carpet, its inertia was broken. Neither of them were kept together. It also had the inertia to remain at rest. It also had the inertia to remain at rest. As soon as you hit the stick, it remained here because you did not hit
it a bit, you hit it on the carpet, it remained here and the carpet fell down suddenly because you hit the stick, that is why you saw dust flying. The butt actually does not fly; if the carpet falls down then that is inertia of rest. So what is the reason for inertia of rest? Because as soon as you hit the stick on the carpet, the inertia of rest of the carpet is broken and now it has come into motion. But the dust remained the same because you did not hit it with a stick. You cannot even hit it
with a stick. The particles are so small. This is because the force of the stick makes the carpet move to and fro. That is because when the force of the stick is applied, the carpet moves here and there. It gets shaken there but the dust particles remain in the same position hence they appear separate from the carpet, so keep this in mind, it is all because of inertia, it is okay if he asks what happened to the carpet, then the inertia is broken. Inertia of Rest Changes into a It Breaks and It
Converts Into End From Motion and Dust What Remains in Inertia of Rest Next is Explained How Do the Leaves and Fruits Get Detached from the Trees If They Vibrally Shake Its Branches If the Tree Okay , there are branches on the tree, so they are saying that if you shake the branches of the tree too fast, the leaves will break, why is it very easy? Okay, this is this branch of the tree and this leaf on it, both are stuck. The inners were at rest. As soon as you shook, who are you shaking? The iner
tia of the branch of the branch was completely broken, it started moving here and there but the leaf remained in the same place, so it is an obvious thing. Both were stuck, now if I remove it, it will break very quickly because its base is fragile, so the leaf remains there, the tree shakes and when it has nothing to attach to, what will happen is it will fall down. Simple One a Tree Say: When you shake a tree , it moves here and there, but it has fruits. I have just taken the example of a leaf.
There can be fruits and leaves, it remains in inertia of rest, it remains at rest. This is why its inertia has changed, it remains at rest, hence it gets separated from the trees and falls down. That's why it does and falls in the forward direction. Most important, as soon as you are a moving bus, the bus was moving and the brakes were applied immediately. Why do we feel a jerk forward? Now understand carefully. Look, we were sitting in the bus. Right, now the bus was moving, so what is the ine
rtia of motion? Right, it is in the inertia of motion. We were sitting in the bus, so our legs. We were in touch with the bus, so what kind of inertia of motion were we, we were also in the state of walking, now two things have happened, this is a bus and we are sitting on it, so what have we done, we are also in motion and this It was also in motion, when we hit the brakes, the inertia of the bus stopped and broke. Now the bus stopped suddenly, but there was no force on our body, no force was a
pplied directly on the bus, so the inertia of the bus ended there and then. It did not happen on the body, our body kept moving forward because we were in motion, we will remain in motion, so what happened, we just remained there and we kept moving forward but now there is one thing in this also, our body is fine when we sit. We are sitting, now understand my point carefully, this is the bus below, our legs are in contact with the bus, so as soon as the inertia of the bus is broken, the inertia
of our legs is also broken, our legs will stop at the same place, our upper body is above. The body above will remain in the inertia of the one moving ahead of it, hence we feel a shock because the bus has stopped because there is a force on the bus, our legs are in contact with the bus, our legs have also stopped completely, if there is no body above us, then we will suddenly feel There is a shock and we immediately come back, now there are some things, if the child is small then your lower leg
s are not even touching him, assume that he will not get the shock so fast. If your upper body also you take a second. Even if you are sitting comfortably and are in contact with the bus, you will not get a shock because when the bus stops, your legs also stop and your upper body also stops. You are in contact with the bus. Do you understand what I am talking about? Now you will ask me a question that ma'am you said that if this thing is touching it then it will not hurt, it will stop here, it w
ill not stop. You are absolutely right, what is happening now, in this condition, our feet were in contact with the bus and the bus was moving, so we both, I and the bus, were not in different motions, here different motions are going on inside me, different motions are going on inside the bus. Actually , I was at rest, I was completely at rest, I was just sitting in the bus, hence there was inertia moving inside me, so when there is such a condition that the motion I have is due to someone else
, then it will definitely happen because like dust . Now there is dust, dust is sitting on the carpet, dust was there before and is sitting now, remember, but when I am there, I myself am standing still, the bus is moving and because of the bus moving, I am moving. So here there is indirect motion, so this thing will make a difference. Well, let's do the opposite scenario. We were sitting, the bus was stopped and if the bus suddenly started moving, then suddenly we would get a shock like this. W
hy the same bus was stopped, it was in inertia of rest. We are sitting in it, we are in the inertia of rest, the bus started the engine, gave the race, then the bus started moving, the inertia of the bus broke right, the inners of our legs broke, our legs went forward but our upper body will remain behind. No, we were at rest, hence we get a shock from behind, so this is also due to inertia, that's why seat belts are made necessary for us, see, that is why there is a provision for seat base, bec
ause if we wear seat belts on our If our body remains in contact with the seat, we will not be shocked. Simple seat belts are necessary because if it ever happened that a car was coming at a very high speed and it hit the brakes suddenly, then what would happen if we would fall forward and our head would burst. And we mean, head injury is very dangerous there , but if there is a seat belt, then we will have contact with the back seat and we will not fall forward completely. That's it. Well, this
is the third I think and the last example of a car or bus in a shaken area. If you have ever been to a mountainous place, when there is a turn like this, then if you are sitting on this side, then it will collide with you, just look at the bus, why till now we were walking straight, there was inertia of direction in us. We will try to walk in the direction . Now understand carefully what happened. The bus turned its wheel to the right. The bus changed its direction but our body went in the same
direction. What happened? Is the bus moving like this? Our body is like this . It is moving, so this shoulder of ours got hit but after that automatically our direction changes and this is your inertia of direction. Why is it dangerous to jump out of a moving bus ? Why is it dangerous? It is very dangerous because if the bus is moving, see whether the bus is moving, it is the direction, it is just in the inertia of motion, it is just what is there, it is in the inertia of motion, like you will
jump down for exam, I am normally the people who Let's do it. I am not talking about that. Yes, people will keep jumping down and running. After some time, I am not talking about that. I am just saying that the bus is moving and you are jumping like this. If I am talking about that, then what will happen in it? You were still in motion because you were in the bus, now when you suddenly jumped and stopped, you came to rest, you will not be able to change suddenly, there will be so little time, yo
u will fall, that is why in the first place, this should not be done, but if Have you ever noticed that people who board or deboard a moving bus, if they board a moving bus, they first run for a while, that is, they run for a few seconds and then board so that their inertia changes according to time. Even if they are coming down, they come down like this, they will come down and then run for a few seconds with the bus and then leave it so that they can change their inertia. Simple, guys, this wa
s inertia and Newton 's first law, many are based on this. There are questions which I will tell you today, please give me its explanation in the comment section. Normally, if we are carrying luggage then we should keep it on top of the car, then we should tie it down. Why should you people tell me that if my car is moving at high speed ? So why should I tie the luggage with a row, I have put all the other questions in it, so you have the reason for all, this is the question whose answer you wil
l give me in the comment section and also in the comment section , you guys are going to tell me the topic of the next video. Ho and I really really hope that this series is beneficial for you. Please give your suggestions, they are very valuable and they are also very important for us because we will know where you are lacking from our side and what is missing from your side. What else do you need or can we provide you? Because it is because of the same M that you people get the benefit of it a
nd you people just spend some time, 15 minutes, watch a video and when you leave, you don't even realize and all your major topics are covered. Go Datchi today's video These are our batches Complete batch of General Awareness All topics If you want to cover proper foundation in a batch then you can enroll in General Awareness batch Rest Officer batch is available Dronacharya batch is available And playlist is yours Have a good day and goodbye with youtube1 video till then
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