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A machine gun has a mass of 200 Kg. It fires 35 gm bullets at the rate of 40 bullets per second with a speed of 400 m/s.The force needed to keep the gun fixed is_____________________

A machine gun has a mass of 200 Kg. It fires 35 gm bullets at the rate of 40 bullets per second with a speed of 400 m/s.The force needed to keep the gun fixed is_____________________

Grade:11

1 Answers

Badiuddin askIITians.ismu Expert
147 Points
11 years ago

Dear sindhuja

conser the liner momentum

200*0 + 35/1000 *0  =200 *v  +35/1000  *400

v=-57.142 m/sec

we know that F=rate of change of linear momentum

                     =(0-(-200*57.142))/(1/40)

F= 457136 N

  =45.7kN


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