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A machine gun of mass 10 kg, fires 10 gm...

A machine gun of mass 10 kg, fires 10 gm bullets at the rate of two every second. Each bullet comes out with a velocity of 200 m/s. The velocity of recoil of the gun at the end of the fourth second, after firing starts is

A

1.6 m/s

B

0.8 m/s

C

3.2 m/s

D

2.0 m/s

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The correct Answer is:
A
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