Physics

Problem

Steps involved in obtaining the relation

P = Fv

are listed below in random order: (1) Substitute

\dfrac{d\mathbf{r}}{dt}

\mathbf{v}

. (2) Start with

\mathrm{d}W = \mathbf{F}\cdot \mathrm{d}\mathbf{r}

. (3) Divide both sides by

\mathrm{d}t

. Which of the following sequences of these steps yields the required relation correctly? a)

(2)\,\rightarrow\,(1)\,\rightarrow\,(3)

(2)\,\rightarrow\,(3)\,\rightarrow\,(1)

(1)\,\rightarrow\,(2)\,\rightarrow\,(3)

(3)\,\rightarrow\,(2)\,\rightarrow\,(1)