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A machine gun fires a bullet of mass 50 ...

A machine gun fires a bullet of mass 50 gram with a velocity of 800 m/s. The man holding the machine gune can exert a maximum force o 200N. What is the maximum number of bullets he can fire per second?

A

2

B

3

C

5

D

Any number of bullets

Text Solution

Verified by Experts

The correct Answer is:
C
Suppose that the man can fire n bullets/sec
`therefore` Momentum of n bullets/sec
`=n(mv)= nxx50xx10^(-3) xx 800= 40n`
But by Newton's second law
F = Rate of change of momentum
`therefore 200= 40n therefore n=5` bullets
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