A machine gun fires 240 bullets per minute. If the mass of each builder is 10g and the velocity of the builder is 600m/s, the power (in kilowatt) of the gun is)
(Answer is 7.2, but I don't know how to solve it... Please provide an explanation)
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Work done by the gun=the total kinetic energy of the bullets=n1/2mv^2=240.1/2.10.10^-3.(600)^2=120.10.10^-3.360000
power=work done/time taken=120.10.10^-3.360000/60=7200W=7200/1000=7.2KW(1KW=1000W)
TejuKamath:
Thank you so so much!
Answered by
1
Power = force × velocity = mnv × v = mnv^2 Substitute the values = 10/1000 × 240/60 ×600 ×600 =7200 W =7.2 kW
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