Question

Calculate the energy possessed by a stone of mass 20g kept at a height of

5m.Take g =10m/s2

Answer 1

(P)Energy= mgh
=20×10×5
1000Joules..

Answer 2

The energy possessed in this situation is potential energy.
Potential energy = mass× gravity × height
Mass = 20g
= 20/1000 kg
gravity = 10m/s^2
height = 5m

P.E = 20/1000×10×5
= 1000/1000
= 1 J
The energy possessed is 1 J