Question

A bullet of mass 20g is fired from a gun of mass 4kg. If the bullet moves with the velocity of 150m/s find the recoil velocity of the gun.​

Answer 1

Initial momentum of the system is 0 as it is at rest.

After firing-

MV=mv

⟹V=

M

mv

=

2

0.02×150

⟹V=1.5m/s