Question

A bullet of mass 30 g is horizontally fired with a velocity 100 m/s from a
pistol of mass 1.5 kg. What is the recoil velocity of the pistol?
A. 2.0 m/s
B. − 2.0 m/s
C. 4.5 m/s
D. −4.5 m/s

Answer 1

Answer:

answer is 4.5 m/s

Explanation:

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Answer 2

Given:-

Mass of the bullet(m)=30g

$\implies$30/1000

$\implies$0.03kg

Velocity of the bullet(v)=100m/s

Mass of the pistol(M)=1.5kg

To find:-

Recoil velocity of the gun(V)

Solution:-

By law of conservation of momentum,we get-----

$\implies$MV-mv=0

$\implies$V=mv/M

$\implies$(0.03×100)/1.5

$\implies$2m/s

Thus, recoil velocity of the gun is 2m/s.