Question

a bullet of mass 20 g is horizontally fired with a velocity 150 metre per second from a pistol of mass 2 kg what is the recoil velocity of the pistol?
a. 1.5 m/s
b. -1.5m/s
c. 150 m/s
d. -150 m/s​

Answer 1

Answer:

a.

Explanation:

1.5 m/s

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Answer 2

Answer:

according to law of conservation of momentum

m1v1+m2v2=m1v1'+m2v2'

Explanation:

0.02×0+2×0=0.02×150+2×v2'

0=3+2v2'

2v2'=-3

v2'=-3/2

v2'=-1.5

Hence correct answer is option B

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