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A rifle of 20 kg mass can fire 4 bullets...

A rifle of 20 kg mass can fire 4 bullets`/s`. The mass of each bullet is `35 x 10^(-3)` kg and its final velocity is 400 `ms ^(-1)` Then, what force must be applied on the rifle so that it does not move backwards while firing the bullets?

A

80 N

B

28 N

C

-112N

D

-56N

Text Solution

Verified by Experts

The correct Answer is:
D
changes in volume of air are assumed to be isothermal.
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A machine gun has a mass of 20kg. It fires 35 g bullets at the rate of 4 bullets per second, with a speed of 400 ms^(-1) . What force must be applied to the gun to keep it in position?

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