00:01
In this problem, we have been given some basic principles that are used in physics.
00:07
So we will discuss them one by one.
00:09
So first, when we talk about an object in uniform motion, so the object present in uniform motion, its net force is likely to be zero, because the object is not accelerated.
00:22
And in the next case, when we talk about accelerated motion, so in that case, the object will have some acceleration, and if it has some acceleration, then there will be a accelerated, will be some net force that's associated with the object and that's not zero of course.
00:37
And in the next situation we have to talk about the circular motion which is uniform in nature.
00:43
So any object which is moving in a circular path and let's say it's moving at a constant speed, in this case the net force which is acting on the object that's centripetal force and that acts towards the center whose magnitude is given by mv square by r.
00:58
And in the next situation we have to talk about a very important theorem which relates work and energy we call that as work energy theorem so according to work energy theorem the network done on an object is equal to the change in the kinetic energy and in the next situation we have to talk about the conservation of momentum so any object let's say a system of objects if that's colliding or any change is going through that so in that case we can see the conservation of momentum is always valid, provided that there is no external force.
01:37
And according to conservation of momentum, we can see that the total initial momentum, so let's represent momentum using p.
01:45
So total initial momentum will be equal to the total final momentum, provided here that the condition must be that there is no external force which is acting on the system of objects...