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2. A machine gun has a mass of 20 kg. It fires 35 g bullets at the rate of 4 bullets per second, with aspeedof400ms . What force must be applied to the gun to keep it in position? 6

Answer»

Here,Mass Of Machine Gun(m)= 20kg

Mass of each Bullet, (M)=35g=0.035kg

Velocity Of Bullet(v)=400m/s

No.Of Bullets/sec=4

Force required = rate of change of linear momentum of bullets=n(mv)/t

=4×(0.035×400)/1=56N



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