Question

A ball dropped from a height of $2\,m$ rebounds to a height of $1.5\,m$ after hitting the ground. Then the percentage of energy lost is

• A. 25
• B. 30
• C. 50
• D. 100

Answer 1

Answer: (A)

25

Answer 2

Percentage energy loss
$=\frac{mg(2-1.5)}{mg.2}\times 100$ $=25$