Question

A machine gun fires 60 bullets per minute with a velocity of `700ms^(-1)`. If each bullet has a mass of 50g, find the power of the gun.

Answer 1

Here, mass of 60 bullets,
`m=60xx50=3000g=3kg`
`v=700m//s, t=1min=60s, P=?`
`P=(W)/(t)=(KE)/(t)=(1)/(2)(mv^(2))/(t)=(1)/(2)xx(3(700)^(2))/(60)`
`=12250W`