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A machine gun has a mass 4 kg. It fires ...

A machine gun has a mass 4 kg. It fires 50 gram bullets at the rate of 45 bullets per minute at a speed of `400 ms^(-1)`. What force is required to keep the gun in position ?

A

5N

B

10N

C

20 N

D

40 N

Text Solution

Verified by Experts

The correct Answer is:
B
Momentum per second associated with the bullets
`=50/1000xx400xx30/60`
=10N
This rate of change of momentum gives rise to force which acts as a reaction on the machine gun.
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