Questions
A machine gun having a power 81 KW fires n bullets per second each of mass 5gm. If the velocity of each bullet is
detailed solution
Correct option is A
P=12mnv2t 81×103=12×5×10−3n×81×1041 100=52n⇒n=2005=40Talk to our academic expert!
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A 500-kg car, moving with a velocity of 36 kmh-1 on a straight road unidirectionally, doubles its velocity in 1 min. The average power delivered by the engine for doubling the velocity is
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