First slide
Power
Question

A body is moving undirectionally under the influence of a source of constant power supplying energy . Which of the diagrams shown below correctly shows the displacement time curve for its motion?

Difficult
Solution

POWER =FORCE X VELOCITY P=ma  v P=mdvdtv Pmdt=vdv integrating Ptm=v22 2Ptm=v2 2Ptm=v=dsdt 2Ptmdt=ds integrating s=2Pmt3232 s α t32 hence the second graph is correct one

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