An automatic gun fires 360 bullets per minute with a speed of (360 ~km / h ). If each bullet weighs (20 ~g ), the power of the gun is

Step-by-step solution

Speed of each bullet, (v=360 ~km / h ) (=360 5 18 ~m / s =100 ~m / s ) Number of bullets fired per minute, (N=360 ) Kinetic energy of 360 bullets, (k^ =N ) kinetic energy of each bullet ( aligned & =360 1 2 m v^2=360 1 2 0.02 100^2 & =3.6 10^4 ~J aligned ) ( aligned Power of gun & = Total energy Time & = 3.6 10^4 60 =600 ~W aligned ) ([ ) Time, 1 minute (=60 ~s )]