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Question 30513
JEE Physics · Medium

Center of Mass, Momentum and Collision: Coefficient of Restitution MCQ

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Coefficient of RestitutionMediumQuestion 30513

Question

The coefficient of restitution e is defined as:
  1. A
    Speed of approach / Speed of separation
  2. B
    Speed of separation / Speed of approach
    Correct
  3. C
    Change in momentum / Force
  4. D
    Final KE / Initial KE

Correct answer

Speed of separation / Speed of approach

Explanation

e = (relative speed after) / (relative speed before) = (v₂'−v₁')/(u₁−u₂). For elastic: e=1; perfectly inelastic: e=0.

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