Question

A bullet of mass 10 g is fired at a speed of 200 m/s from a gun of mass 4 kg. What is the recoil velocity of the gun?

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Answer 1

Answer:

m1=10g=0.01kg

m2=4kg

u1=0

u2=0

v1=200m/s

v2=?

m1u1+m2u2=m1v1+m2v2

(0.01)(0)+(4)(0)=(0.01)(200)+(4)v2

0 = 2 + 4v2

v2 = -0.5 m/s