Question

A horse exerts a force of 200 lb. while pulling a sled for 3 miles. If the trip takes 30 minutes, what is the power output of the horse in horsepower?

Answer 1

Given:

$3\;\rm mi=15840\: ft$

$1\rm\: lb\cdot ft/min=33000\: hp$

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

$$P=\rm\frac{200\: lb*15800\: ft}{30\: min}=105333\: lb\cdot ft/min=3.19\:hp$$