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Home » Past Questions » Physics » A machine gun with a mass of 5kg fires a 50g bullet at speed of 100ms-1. The rec...

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

Question

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

Options

A) 0.5 ms-1

B) 1.5 ms-1

C) 1 ms-1

D) 2 ms-1

E) 4 ms-1

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The correct answer is C.

Explanation:

Gun momentum = bullet momentum
5 × v = 0.05 × 100
v = 1 ms-1

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