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Power applied to a particle varies with ...

Power applied to a particle varies with time as `P =(3t^(2)-2t + 1)` watt, where t is in second. Find the change in its kinetic energy between time `t=2s` and `t = 4 s` .

A

`32 J`

B

`46 J`

C

`61 J`

D

`102 J`

Text Solution

Verified by Experts

The correct Answer is:
B
`DeltaK =W =intPdt =int_(2)^(4)(3t^(2)-2t + 1)dt`
`=46 J`.
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