A machine gun fires 240 bullets per minute with certain velocity. If the mass of each bullet is 10^(-2) kg and the power of the gun is 7.2 kW, find the velocity with which each bullet is fired.

A machine gun fires 240 bullets per minute with certain velocity. If t

1.	A machine gun fires 240 bullets per minute with certain velocity. If the mass of each bullet is 10^(-2) kg and the power of the gun is 7.2 kW, find the velocity with which each bullet is fired.
Answer» Solution :MASS of each BULLET `m=10^(-2)KG` Power = 7.2 kW `= 7.2xx10^(2) W2` `(n)/(t)=240` BULLETS/min `= (240)/(60)` bullets / sec. Power `= (n((1)/(2)mv^(2)))/(t)=7.2xx10^(3)=(240xx(1)/(2)xx10^(-2)XX v^(2))/(60)` `v^(2)=(7.2xx10^(3)xx2)/(4xx10^(-2))=(7.2)/(2)xx10^(5)=3.6xx10^(5)` v = 600 m/s.