Question

A mover brings a box up the stairs in 10 seconds. If he applied a force of 20 N over a distance 10 m on the box, calculate the power required for him to complete this action

Answer 1

Total work done is calculated as

`\begin{gathered} \text{work}=\text{force}* dis\tan ce \\ \text{ =20N}*10m \\ \text{ =200 J} \end{gathered}`

The power is calculated as ,

`\begin{gathered} \text{Power}=\frac{work}{\text{time}} \\ \text{ =}\frac{\text{200 J}}{10\text{ sec}} \\ \text{ =20 W} \end{gathered}`