Question

A bullet of mass 10g is fired from a gun of mass 1 kgwith a vekocity of 100m/s. Calculate the velocity recoil of a gun and also calculate the ratio of kinetic energy of bullet and gun.

Answer 1

mass of bullet = 10 g = 0.01 kg

velocity of bullet = 100 m/s

mass of gun = 1 kg

velocity of gun = ?

momenta of gun = momenta of bullet

x = 0.01 × 100

x = 1

∴ the recoil velocity of the gun is 1 m/s