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  4. A machine gun of mass 10 kg fires 20 g bullets at the rate of 180 bullets per minute with a speed of 100 m s -1 each. The recoil velocity of the gun is

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Q. A machine gun of mass $10\, kg$ fires $20 \,g$ bullets at the rate of $180$ bullets per minute with a speed of $100 \,m s ^{-1}$ each. The recoil velocity of the gun is

JEE MainJEE Main 2023Laws of Motion

Solution:

$ 20 \times 10^{-3} \times \frac{180}{60} \times 100=10\, V $
$ \Rightarrow v =0.6 \,m / s $