Question

A machine gun of mass 10 kg fires 20 g bullets at the rate of 180 bullets per minute with a speed of 100 m s^-1 each. The recoil velocity of the gun is

(1) 0.02 m/s 

(2) 2.5 m/s 

(3) 1.5 m/s 

(4) 0.6 m/s

Answer 1

Correct option is (4) 0.6 m/s