00:01
Hello, question is saying that certain force acting on a 20 kg mass changes velocity from 5 to 2 meter per second.
00:08
Okay, so here given is mass is given as 20 kg and initial velocity is given as 5 meter per second, 5 meter per second and final velocity is given as 2 meter per second.
00:24
So if you talk about the initial kinetic energy, kinetic energy initial initial, it will be high.
00:31
Half m u square.
00:34
So half mass is given as 20.
00:38
U is given as 5 meters, so it will be 25.
00:41
So just solve this 2 .10, it will be 250 jule.
00:46
So from kinetic energy, final kinetic energy if you talk about, kinetic energy final, it will be half mv square.
00:56
All right, so half, mass is given as 20, velocity is given as 2 ,000...