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Question 30522
JEE Physics · Medium

Center of Mass, Momentum and Collision: COM — Velocity MCQ

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COM — VelocityMediumQuestion 30522

Question

System: 2 kg at v = 4 m/s and 3 kg at v = −1 m/s. Velocity of COM is:
  1. A
    1 m/s
    Correct
  2. B
    1.5 m/s
  3. C
    2 m/s
  4. D
    −1 m/s

Correct answer

1 m/s

Explanation

v_cm = (m₁v₁+m₂v₂)/(m₁+m₂) = (2×4 + 3×(−1))/5 = (8−3)/5 = 1 m/s.

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