A bullet of mass 20 gm is fired in the horizontal direction with a velocity 150 mis from a pistol of mass 1 kg. Recoil velocity of the pistol is

Options

A. 3 m/s
B. 3 km/s
C. 300 m/s
D. 1/3 m/s

Answer

A

Explanation

20 gm = 0.02 kg
Momentum of the pistol = Momentum of the bullet
`rArr" "m_(1)v_(1)=m_(2)v_(2)`
`rArr" "1xxv_(1)=0.02xx150`
`rArr" "v_(1)=3 m//s`