A machine gun with a mass of 5kg fires a 50g bullet at speed of 100ms-1. The recoil speed of the machine gun is

A.

0.5 msec-1

B.

1.5 msec-1

C.

1 msec-1

D.

2 msec-1

E.

4 msec-1

View answer & explanation

Correct answer is C

Gun momentum = bullet momentum

5 x v = 0.05 x 100

v = 1 msec-1

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