Question

A machine gun fires $50gm$ bullets at a speed of $1000m/s$. The gunner, holding the machine gun in his hands, can exert an average force of $180$ newton against the gun. Determine the maximum number of bullets he can fire per minute.

Answer 1

Answer: 216.00

mass of bullet $=50$ gram.
speed of bullet $=v=1000m/s$.
recoil force $=180N$
$F=n(mv)$
$n=\frac{F}{mv}=\frac{180}{0.050\times 1000}$
$=3.6$ bullet / sec
$\therefore$ no. of bullets per minute
$3.6\times 60=216$ bullets / min