ï»¿ A machine gun fires a bullet of mass 40 g with a velocity 1200 msâˆ’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? from Physics Laws of Motion Class 11 Manipur Board

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A machine gun fires a bullet of mass 40 g with a velocity 1200 msâˆ’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?

• oneÂ

• Four

• Two

• Three

D.

Three

The force exerted by machine gun on man's hand in firing a bullet = change in momentum per second on a bullet or rate of change of momentum

The force exerted by man on machine gun = 144 N Hence, number of bullets fired =144/48 = 3

The force exerted by machine gun on man's hand in firing a bullet = change in momentum per second on a bullet or rate of change of momentum

The force exerted by man on machine gun = 144 N Hence, number of bullets fired =144/48 = 3

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