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Power applied to a particle varies, with time aso P (3t -2t + 1) watt, where t is in second.The change in its kinetic energy between time t =2 sand t= 4 s is(1) 32J(3) 61 J(2) 46 J(4) 102 J |
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Answer» dw=(3t²-2t+1)dt=>w=[t³-t²+t](2s to 4s)so W=56-12+2=46 J.It is the kinetic energy |
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