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Question 30554
JEE Physics · Medium

Center of Mass, Momentum and Collision: Elastic — Heavy on Light MCQ

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Elastic — Heavy on LightMediumQuestion 30554

Question

A very heavy ball (M >> m) moving at speed V collides elastically with a light ball (mass m) at rest. The light ball's speed after collision is approximately:
  1. A
    V
  2. B
    2V
    Correct
  3. C
    V/2
  4. D
    0

Correct answer

2V

Explanation

Using elastic formula: v_light = 2M×V/(M+m) ≈ 2V when M >> m. The light ball bounces off at about twice the heavy ball's speed.

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