a machine gun fires a bullet of mass 4kg with velocity of 12m/s.the person holding it can apply a maximum force of 144n on the gun.what is the maximum number of bullets that can be fired per second

Mass of the bullet is, m = 4 kg

Velocity of the bullet, u = 12 m/s

Let, ‘n’ be the number of bullets fired per second.

So, momentum gained by the bullets per second is = nmu = (n)(4)(12) = 48n

This is also the rate of change of momentum of the fired bullets.

We know, force = rate of change of momentum

So, 144 = 48n

=> n = 3 bullets/second