Q.

If a machine gun fires n bullets per second each with kinetic energy K, then the power of the machine gunis

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a

nK2

b

Kn

c

n2K

d

nK

answer is D.

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Detailed Solution

Power of the machine gun= Total work done  Time =n·12mv2t=n·12mv2t  ∵K=12mv2,t=1 s∴  The power of the machine gun  = nK
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If a machine gun fires n bullets per second each with kinetic energy K, then the power of the machine gunis