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Question 30527
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Center of Mass, Momentum and Collision: Perfectly Inelastic — Two Moving MCQ

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Perfectly Inelastic — Two MovingMediumQuestion 30527

Question

3 kg at 4 m/s (east) and 2 kg at 3 m/s (west) collide and stick. Final velocity is:
  1. A
    0.6 m/s east
  2. B
    0.6 m/s west
  3. C
    1.2 m/s east
    Correct
  4. D
    1.8 m/s east

Correct answer

1.2 m/s east

Explanation

p_net = 3×4 − 2×3 = 12−6 = 6 kg·m/s east. v_f = 6/(3+2) = 1.2 m/s east.

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