1.

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

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



Discussion

No Comment Found

Related InterviewSolutions