A machine gun fires 33 g bullets at a speed of 342 m/s. The gun fires 115 bullets/min. What is the average force the shooter must exert to keep the gun from moving?

The average force that the shooter must exert to prevent the weapon from moving is 21.7 Newtons.

Explanation:

m=33g=0,033kg

V = 342 m/seg

115 bullets/min = 1 bullet every 0.52 seconds.

By the principle of momentum and amount of movement we have to:

F*t=m*V

F = (m*V) / t

F = (0.033kg * 342 m/s) / 0.52 sec

F = 21.7 Newtons