A machine gun fires 25 g bullets at the rate of 600 bullets per minute with a speed of 200 m/s. Calculate the force required to keep the gun in position.

Question

anonymous · Answer

600 bullets per minute  = 600/60 = 10  bullets per  second

F = n * m * v

  = 10 * 200 * 25 * 10^-3

 = 2N

anonymous · Answer

But force is rate of change of momentum right?

anonymous · Answer

sorry  F=50N

anonymous · Answer

He gave you in fact Change of momentum/ per 1 sec

anonymous · Answer

My calcu was wrong..))

anonymous · Answer

I didn't get you @Mikael.

anonymous · Answer

See he calculated for U how much Momentum is given to ALL the bullets flying-out in the period of 1 second . IT IS the change in momentum of the gun too - with a minus sign of course

anonymous · Answer

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