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A gun of mass 4 kg initially at rest fir...

A gun of mass 4 kg initially at rest fires a bullet of mass 4g with a speed of 50m/s as seen by an observer on ground. Find the impulse on bullet and recoil speed of the gun.

A

`0.2 kg m/sec, 0.05 m/s`

B

`0.2 kg m/sec, 0.01 m/s`

C

`0.1 kg m/sec, 0.01 m/s`

D

`0.1 kg m/sec, 0.05 m/s`

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