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Question 30512
JEE Physics · Medium

Center of Mass, Momentum and Collision: Recoil — Gun MCQ

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Recoil — GunMediumQuestion 30512

Question

A 4 kg gun fires a 0.02 kg bullet at 300 m/s. Recoil speed of the gun is:
  1. A
    0.5 m/s
  2. B
    1.5 m/s
    Correct
  3. C
    0.015 m/s
  4. D
    75 m/s

Correct answer

1.5 m/s

Explanation

0 = 0.02×300 + 4×v_gun → v_gun = −6/4 = −1.5 m/s. Recoil speed = 1.5 m/s.

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