Physics

Problem

Which one of the following expressions gives the average power

P_{\text{avg}}

when an amount of work

W

is done in a time interval

t

? a)

P_{\text{avg}} = \dfrac{W}{2t}

P_{\text{avg}} = \dfrac{W}{t}

P_{\text{avg}} = \dfrac{2W}{t}

P_{\text{avg}} = \dfrac{W}{\sqrt{2}\,t}