Question

A body of mass 0.1 kg falling freely under gravity takes 10s to reach the ground. Calculate kinetic energy and potential energy of the body when the body has travelled for 6s

Answer 1

Answer:

The total height is 500m.

So initially, K.E.=0 and P.E.=mgh=500J

So total mechanical energy is 500J which will be conserved throughout the journey.

Now,after 6s the speed of the body will be 60m/s

So K.E.=1/2×m×v^2=180J

So P.E.=M.E. - K.E.=500J-180J=320J

i hope it helps you.☺

Explanation: