A machine gun of mass 10   kg fires 20   g bullets at the rate of 180 bullets per minute with a…

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 :
  1. 0.02 m s-1
  2. 2.5 m s-1
  3. 1.5 m s-1
  4. 0.6 m s-1

Solution

Number of bullets fired per second 18060=3.

Applying momentum conservation, we get

320×10-3×100=10v

⇒v=0.6 m s-1

Asked in: JEE Main 2023 (30 Jan Shift 2)

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