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Question

A body is allowed to fall on the ground from a height h1. If it is rebound to a height h2 then the coefficient of restitution is:


A
h2h1
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B
h2h1
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C
h1h2
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D
h1h2
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Solution

The correct option is B h2h1
When a ball is dropped from a height h₁, the velocity before reaching ground is
v=2gh1
When the ball rebounces to a height h₂, the velocity just after impact was
v=2gh2
Coefficient of restitution
=2gh22gh1=h2h1
Hence,
option B is correct answer.

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