Question

A ball of mass 200gm falls from a height of 5m. What will be it's kinetic energy when it just reaches the ground ? ( g = 10m/s square

Answer 1

ANSWER :

Mass of the ball = 200 gm = 0.2 kg

Height from the ground = 5 m

Acc. due to gravity = 10 m/s^2

Potential Energy = m x g x h

Potential Energy = 0.2 x 10 x 5

Potential Energy = 10 J

Therefore, kinetic energy of the object just before reaching the ground is 10 J.

Explanation : As the object is dropped from a height, the potential energy of the body decreases and kinetic energy increases. So, just before touching the ground all the potential energy of the body gets converted to kinetic energy.

Hope this helps you☺☺