A bullet of mass 20gm is fired from a riffle of mass 8 kg with a velocity of 100m/s. The velocity of recoil of the rifle is
0.25 m/s
25 m/s
2.5 m/s
250 m/s
0 = m1v1 +m2v2 recoil velocity is v2= (m1v1)/m2