Question

A box is pulled a distance of 20 meters by a force of magnitude 40N, in the direction of the force ,over a period of 10 seconds Find the power generated by the force

Answer 1

The formula for the power is,

`\begin{gathered} P=(W)/(t) \\ Where, \\ P=Power \\ W=Work \\ t=Time \end{gathered}`

Work done is,

`\begin{gathered} W=F* S \\ Where, \\ W=Work \\ F=Force \\ S=Displacement \\ here, \\ F=40N;\text{ }and\text{ }S=20m; \\ So, \\ W=F* S=40*20=800J \end{gathered}`

Here time taken to do the work is 10 sec

So,

`P=(W)/(t)=(800)/(10)=80\text{ watt/sec}`

So power generated by the force is 80 watt/sec.