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Question 30567
JEE Physics · Medium

Center of Mass, Momentum and Collision: JEE — COM at Rest MCQ

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JEE — COM at RestMediumQuestion 30567

Question

System of particles at rest. An internal explosion occurs. After the explosion, the COM:
  1. A
    Moves in the direction of the largest fragment
  2. B
    Remains at rest (no external force)
    Correct
  3. C
    Moves upward due to explosion
  4. D
    Moves with average velocity of fragments

Correct answer

Remains at rest (no external force)

Explanation

Internal forces cannot change the velocity of the COM. If COM was at rest, it remains at rest after internal explosion.

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