6 bullets are fired in a second from a machine gun with velocity of 400 ms^(-1). The mass of machine gun and bullet are 10 kg and 30g respectively. What is the value of force is to be exerted on machine gun to keep it stationary ?

6 bullets are fired in a second from a machine gun with velocity of 40

1.	6 bullets are fired in a second from a machine gun with velocity of 400 ms^(-1). The mass of machine gun and bullet are 10 kg and 30g respectively. What is the value of force is to be exerted on machine gun to keep it stationary ?
Answer» 72 N 7200 N 2N 12N Solution :Forceis to beexertedon machinegumchangein momentumof bullets `=nmv` `=(6 ) (30 XX 10^(-3)) (400)` `=72 N`