Question

A machine gun fires $360$ bullets per minute and each bullet travels with a velocity of $600m{s}^{-1}$. If the mass of each bullet is $5gm$, find the power of the machine gun?

Answer 1

Given,

Number of bullets, $n=360nos.$

Mass of bullet, $m=5gram=0.005kg$

Kinetic energy of 360 bullets, $K.E=n\times \frac{1}{2}m{v}^2=360\times \frac{1}{2}\times 0.005\times {600}^2=324000J$

$Power=\frac{kineticenergy}{time}=\frac{324000}{60}=5400watt$