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Question 30510
JEE Physics · Medium

Center of Mass, Momentum and Collision: Explosion — Momentum MCQ

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Explosion — MomentumMediumQuestion 30510

Question

A shell at rest explodes into two fragments (3 kg and 1 kg). The 1 kg fragment moves at 12 m/s. Speed of the 3 kg fragment is:
  1. A
    4 m/s
    Correct
  2. B
    36 m/s
  3. C
    12 m/s
  4. D
    3 m/s

Correct answer

4 m/s

Explanation

Momentum conservation (initial p = 0): 0 = 3×v₁ + 1×12 → v₁ = −4 m/s. Speed = 4 m/s (opposite direction).

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