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Question 30452
JEE Physics · Hard

Work, Power and Energy: Energy Loss — Inelastic MCQ

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Energy Loss — InelasticHardQuestion 30452

Question

A 3 kg clay ball moving at 10 m/s sticks to a 7 kg stationary clay block. Energy lost in the collision is:
  1. A
    75 J
  2. B
    105 J
    Correct
  3. C
    150 J
  4. D
    42 J

Correct answer

105 J

Explanation

v_f = 3×10/10 = 3 m/s. KE_before = ½×3×100 = 150 J. KE_after = ½×10×9 = 45 J. Loss = 150−45 = 105 J.

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