A child pulls on a wagon with a horizontal force of 75 N. If the wagon moves horizontally a total of 42 m in 3.0 min, what is the average power generated by the child?
A) 18 W
B) 22 W
C) 24 W
D) 27 W

Question

Quizplus · Accepted Answer

Power is calculated as work done over time. Work done is force times distance (75 N * 42 m = 3150 J). Time is 3.0 min, which is 180 seconds. Power = 3150 J / 180 s = 17.5 W, which rounds to 18 W.

A Child Pulls on a Wagon with a Horizontal Force