Power delivered to a body varies as P=3t...

Power delivered to a body varies as `P=3t^(2)`. Find out the chang ein kinetic energy of the body from t=2 to t=4 sec.

12 J

56J

24 J

36J

Text Solution

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The correct Answer is:

`P=3t^(2)`
`int P_(4)dt 2 w =DeltaK.E`
`int3t^(2) dt=DeltaKE =56`

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