Question

If the difference between half of Peter's age two years from now and one third
of his age is 7 years then the present age of Peter will be?​

Answer 1

Answer:

Certain force acting on 20 kg mass changes its velocity from 5 m s-1 to 2 m s-1. Calculate the work done by the force. (E k)2 = (1 )/2x 20 — (2)2 = 40 J.