Question

7. A machine gun fires a bullet of mass 40 g with a velocity of 1200 m/s. The man
holding it can exert a maximum force of 144N on the gun. How many bullets can be
fired per second at the most?

(Please help fast please)​

Answer 1

Answer:

3 bullets per second

Explanation:

Given : m=40 g =0.04 kg v=1200 m/s F=144 N

Let n be the number of bullets that can be fired per second.

The force exerted by man must balance the change in momentum of the bullets per second.

∴ F=mnv

OR 144=0.04×n×1200 ⟹n=3 bullets per second