Question

A horse pulls a wagon with a force of 50 N at an angle of 37o with the horizontal and moves along at a speed of 6 km/hr. (a) How much work does the horse do in 10 minutes? (b) What is the power output of the horse?

Answer 1

(a) Work:

$$W=Fvt\cos\theta=33.3\text{ kJ}.$$

(b) Power:

$$P=Fv\cos\theta=66.6\text{ W}.$$