Question

A ball is dropped from a height of 20 m and rebounds to a height of 10 m. The loss of energy is

• A. 5%
• B. 25%
• C. 50%
• D. 75%

Answer 1

The correct option is C 50%

we can just calculate the ratio of potential energy.
P.E$=mgh$ and since height reduced to half the energy also reduced to half so answer is 50%.