Question

A man drop a stone of mass 2kg room the top of a building of height 15m when it reaches the ground find its kinetic energy.

Answer 1

KE=initial PE=2*9.8*15 joules

Answer 2

K.E=initial P. E
:K.E=mgh
K.E=2*15*9.8
K.E=294

Answer 3

According to law of conservation of energy potential energy of an object at the height is transfer is kinetic energy increases the ground

m=2kg
h=15m
g=10m/s

Kinetic energy=mgh
=2×10×15
=300J