Question

A machine gun has a mass of 20 kg .It fires 25g bullets at the rate of 600 bullets per minute with a speed of 200 m/s .Calculate recoil velocity of the gun

Answer 1

Hope this is helpful to you

Answer 2

Answer:

2.5 m/s

Explanation:

1.Recoil velocity of the gun

before firing the total momentum is zero for the system ,so

0=m1v1+m2v2

​so v2 = -m1v1/m2 (here m1 = 25g &, m2 = 20g = 200m/s)

on substituting values  

v2 = 2.5 m/s