Question

A rifle of mass 5 kg fires a bullet of mass 40 g. The bullet leaves
the barrel of the rifle with a velocity 200 ms-1. If the bullet takes
0.004 s to move through the barrel, calculate the recoil velocity
of
the rifle.​

Answer 1

put the values in the formulae of conservation of momentum that is m1u1+m2u2=m1v1+m2v2 and you will get the answer

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