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Question 30505
JEE Physics · Easy

Center of Mass, Momentum and Collision: Conservation of Momentum MCQ

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Conservation of MomentumEasyQuestion 30505

Question

Momentum is conserved in a system when:
  1. A
    Net external force is zero
    Correct
  2. B
    Net internal force is zero
  3. C
    System is at rest
  4. D
    System has constant kinetic energy

Correct answer

Net external force is zero

Explanation

dp/dt = F_external. If F_ext = 0, then dp/dt = 0 and total momentum is constant.

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