Question

A machine gun fires `25g` bullet at the rate of 600 bullets per minutes with a speed of `200m//s`. Calculate the force required to keep the gun in position.

Answer 1

Here, mass of each bullet, `(m)= 25g = (25)/(1000)kg = 1/(40)kg`
Number of bullets fired/minute `=600`
Number of bullets fired/sec, i.e., `n= (600)/(60)=10`
Speed of a bullet, `v=200m//s`
Force required, `F=` rate of changes of momentum of bullets
= momentum of bullets fired/second `= mxxnxxv= 1/40xx10xx200=50N`