Question

Jason and alejandro lift a chair 2 meters into the moving truck using 150 newtons of force. It takes them 3 seconds to lift the chair how much power did they use

Answer 1

As we know that rate of work done is given as power

so here we will first find the work done

Work is the product of force and displacement

so here we have

$W = F.d$

$F = 150 N$

$d = 2 m$

now we have

$W = 150 \times 2$

$W = 300 J$

now in order to find power we will use

$P = \frac{W}{t}$

$P = \frac{300}{3} = 100 W$

so power consumed will be 100 W