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A machine gun fires 60 bullets per minute, with a velocity of 700m/s. If each bullet has a mass of 50g, find the power developed by the gun.

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A machine gun fires 60 bullets per minute, with a velocity of 700m/s. If each bullet has a mass of 50g, find the power developed by the gun.

(a) 1225W

(b) 12250W

(c) 122.5W

(d) 122W

This question was posed to me by my college professor while I was bunking the class.

I'm obligated to ask this question of Work and Energy in section Nature of Physical World of Engineering Physics I

1 Answer

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Right option is (b) 12250W

Easy explanation: Mass of the bullets = 60×50 = 3000g = 3kg

v = 700m/s t = 1min = 60s

Power = W/t = (Kinetic energy)/t = 12250W.

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