STANDARD Physics Potential Energy MCQ Question with Solution

A ball bounces to 80% of its original height. What fraction of its potential energy is lost in each bounce?

A

0.20

B

0.60

C

0.40

D

1

Correct Answer

Option A

Detailed Explanation

Let the ball is dropped from height h. Initial potential energy = mgh. Potential energy after first bounce = mg × 80% of h = 0.80 mgh. Potential energy lost in each bounce = 0.20 mgh. Fraction of potential energy lost in each bounce = 0.20 mgh / mgh = 0.20.

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