Question

A child generates 42 W of power as she pulls a wagon forward across a flat sidewalk with a force of 70 N. The child pulls with this force for 4.5 minutes. What distance does the wagon move?

110 m

160 m

75 m

210 m

Answer 1

160 m

Step-by-step explanation:

Power = energy / time

Energy = force × distance

Substituting:

Power = force × distance / time

42 W = 70 N × d / (4.5×60 s)

d = 162 m

Rounded to two significant figures, the distance is 160 m.