Question

Define power. State two mathematical expressions for power?

Answer 1

Power is defined as the rate at which work is done upon an object.

Power = Rate of doing work

The two mathematical expressions for power are:

1. $\mathit{P}\mathit{o}\mathit{w}\mathit{e}\mathit{r}\mathbf{}\mathbf{=}\mathbf{}\frac{\mathbf{w}\mathbf{o}\mathbf{r}\mathbf{k}}{\mathbf{t}\mathbf{i}\mathbf{m}\mathbf{e}}$
2. $$\begin{gathered} Power=\frac{Force*displacement}{Time} \\ Power=Force*\frac{displacement}{time} \\ \mathit{P}\mathit{o}\mathit{w}\mathit{e}\mathit{r}\mathbf{=}\mathbf{}\mathit{F}\mathit{o}\mathit{r}\mathit{c}\mathit{e}\mathbf{*}\mathit{v}\mathit{e}\mathit{l}\mathit{o}\mathit{c}\mathit{i}\mathit{t}\mathit{y} \end{gathered}$$