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JEE Physics · Hard

Work, Power and Energy: Coefficient of Restitution MCQ

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Coefficient of RestitutionHardQuestion 30450

Question

A ball dropped from height H bounces back to height h. The coefficient of restitution is:
  1. A
    h/H
  2. B
    H/h
  3. C
    √(h/H)
    Correct
  4. D
    √(H/h)

Correct answer

√(h/H)

Explanation

Speed before impact: v₁ = √(2gH). Speed after: v₂ = √(2gh). e = v₂/v₁ = √(2gh)/√(2gH) = √(h/H).

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