A 25-g ball is released from rest 80 m above the surface of the Earth. Just before it hits the surface its speed is 20 m/s. What is the change in energy of the ball during its fall?

The change in energy of the ball during its fall is 14.6 Joules.

Explanation:

Given that,

Mass of the ball, m = 25 g

It is released from rest 80 meters above the surface of the Earth, h = 80 m

Just before it hits the surface its speed is 20 m/s, v = 20 m/s

We need to find the change in energy of the ball during its fall. The potential energy gets converted to its kinetic energy. The change in energy is given by :

So, the change in energy of the ball during its fall is 14.6 Joules.

chemical properties of thing