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Q.

A man fires a bullet of mass 200 gm horizontally  at a speed of 5 m/s' The gun is of one kg mass. By what velocity the gun rebounds backward ?

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a

0 .1 m/s

b

10 m/s

c

1m/s

d

0.01 m/s

answer is C.

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Detailed Solution

. By the law of conservation of momentum m1V1=m2V2  or  V2=m1    V1    /m2 ∴ V2=0⋅2×51=1m/s
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A man fires a bullet of mass 200 gm horizontally  at a speed of 5 m/s' The gun is of one kg mass. By what velocity the gun rebounds backward ?