Question

A bullet of mass 10 gm is horozontally fired with a velocity of 20 m/s from a pistol of mass 3kg.Calculate the recoil velocity of the pistol​

Answer 1

Explanation:

total momentum before firiing,

p=mv

p=(0.01+3)×0

p=0

total momentum after firing

p=mv+mv

p=3×v+0.01×20m/s

p=3v+20m/s

m1v1+m2v2=m1u1+m2u2

3v+20=0

3v=-20

v=-20/3