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Question 30521
JEE Physics · Medium

Center of Mass, Momentum and Collision: Elastic Collision — Velocities MCQ

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Elastic Collision — VelocitiesMediumQuestion 30521

Question

Mass m₁ = 2 kg (u₁ = 5 m/s) collides elastically with m₂ = 2 kg (u₂ = 0). After collision:
  1. A
    v₁ = 5, v₂ = 0
  2. B
    v₁ = 0, v₂ = 5
    Correct
  3. C
    v₁ = 2.5, v₂ = 2.5
  4. D
    v₁ = −5, v₂ = 10

Correct answer

v₁ = 0, v₂ = 5

Explanation

For elastic collision of equal masses (one at rest): velocities are exchanged. v₁ = 0, v₂ = 5 m/s.

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