Question

a bullet of mass 100gm is fired from a rifle of mass 20kg with the speed of 50m/s.calculate the velocity of recoil of rifle​

Answer 1

Explanation:

the answer is in the image

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Answer 2

Answer:

v_recoil = -0.25 m/s

Explanation:

Take bullet + rifle as a system

before firing the net momentum is zero

Since no external forces are applied the change in momentum should be zero

Thus initial momentum = final momentum

0 = 0.1 * 50 + 20 * v

v = -5 / 20 = -0.25 m/s