Question

From a rifle of mass 4 kg, a bullet of mass 50 grams fired with an initial velocity of 35 metre per second. Calculate the initial recoil velocity of the rifle.

Answer 1

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Answer 2

R B
M=4kg. M=50g:, 50/1000= 1/20
U=0. U=35
V=? V =0
M1u1+m2u2=m1v1+m2v2
4×0+1/20×35=4×v1 +1/20×0
35/20=4v1
V1=7×4/4
V1=7