Question

A trolley is pushed along a road with a force of 400 N through a distance of 60 m in 1 minute. Calculate the power developed.

Answer 1

Force applied, (F) = 400 N
Distance travelled, (S) = 60 m
Time, (t) = 60 s
So,
Work done = Force × Distance
= (400) (60) J
= 24000 J
Now, we can calculate the power of the body as,
$\mathrm{Power}=\frac{\mathrm{Work}\mathrm{done}}{\mathrm{Time}}\mathrm{So},\mathrm{Power}=\frac{24000}{60}\mathrm{W}=\boxed{400\mathrm{W}}$
So, the power of this appliance is 400 W.