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JEE Main2004PhysicsLaws of MotionActual

A machine gun fires a bullet of mass 40 ~g with a velocity 1200 ~ms ⁻¹ . The man holding it can exert a maximum force of 144 ~N on the gun. How many bullets can he fire per second at the most?

Options

  1. Aone
  2. Bfour
  3. Ctwo
  4. Dthree

Correct answer

D. three

Step-by-step solution

Change in momentum for each bullet fired is = 40 1000 1200=48 ~N If a bullet fired exerts a force of 48 ~N on man's hand so man can exert maximum force of 144 ~N , number of bullets that can be fired =144 / 48=3 bullets.

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