Center of Mass, Momentum and Collision: Advanced — Minimum e for Bounce MCQ

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Advanced — Minimum e for BounceHardQuestion 30579

Question

A ball falls vertically and bounces off the floor. Minimum e so that the ball rises above its drop height is:

A
e > 1 (impossible normally)
Correct
B
e = 1
C
e > 0
D
e = 0

Correct answer

e > 1 (impossible normally)

Explanation

The ball can only rise above its drop height if it gains energy from the floor (e > 1), which requires an energy source (like an explosive). A standard elastic bounce (e = 1) only returns to the same height.

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