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MHT CET202617 April 2026Evening ShiftPhysicsCenter of Mass, Momentum and CollisionActual

A machine gun fires a bullet of mass 40g with a speed of 600 ms ⁻¹ . The person holding the gun can bare maximum force of 168N on it. The number of bullets that can be fired from the gun per second is

Options

  1. A8
  2. B7
  3. C6
  4. D5

Correct answer

B. 7

Step-by-step solution

Mass of a bullet, m = 40 g = 0.04 kg Speed of the bullet, v = 600 ms ⁻¹ Maximum force, F = 168 N Let n be the number of bullets fired per second. The force exerted by the gun is equal to the rate of change of momentum of the bullets. F = n m v 168 = n 0.04 600 168 = 24n n = 168 24 = 7 The number of bullets that can be fired per second is 7 .

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