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A rifle fires a bullet of 60 g with a ve...

A rifle fires a bullet of 60 g with a velocity of 50 m/s. The velocity of recoil of rifle is 2 m/s. The mass of rifle is

A

3.0 kg

B

2.0 kg

C

1.5 kg

D

1.0 kg

Text Solution

Verified by Experts

The correct Answer is:
C
Mass of bullet = 60 g
Velocity of bullet = 50 m/s
Velocity of recoil of rifle = 2 m/s
Mass of rifle = ? = M
Using law of conservation of momentum.
M `xx` velocity of recoil of rifle
= Mass of bullet `xx` Velocity of bullet
`implies M xx 2 = 60 xx50`
`implies M = (60xx50)/2 = 3000/2 = 1500 g = 1.5 kg `
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