00:01
So in this question, it is given that so whenever we are on the surface of earth, and if you lift an object from here to here, what you are doing is basically the force applied by you and the displacement of the body is in the same direction, you are doing a positive work.
00:22
And that positive work that you are doing is a kind of energy that you are supplying.
00:27
Due to which the total energy of the earth and the mass system must rise.
00:36
So now there is some positive work done by you.
00:40
That means you have supplied energy.
00:42
So it will go somewhere.
00:43
There is a reason to believe that.
00:46
So now what is the amount of work done that you have done? you have done mgh amount of positive work done.
00:54
And this amount of work done which you have done, which it will definitely go into the increase in the energy.
01:04
So amount of work done which you have done here, which is equal to mgh, would be equal to change in the total mechanical energy...