Question

A ball has a mass of 0.5 kg. Dropped from a cliff top. the ball hits the sea below at a speed of 10 m/s. What was the ball's gravitational potential energy before it was dropped?​

Answer 1

25 J

Step-by-step explanation:

Using Law of Conservation of Energy

Total Energy before = Total Energy After

Potential Energy1 + Kinetic Energy1 = Potential Energy2 + Kinetic Energy2

Potential Energy1 + 0 = 0 + Kinetic Energy2

Potential Energy1 =
`(1)/(2)*m*v^(2)` =0.5*0.5*10*10= 25 J