A sleigh and driver with a total mass of 120kg are pulled up a hill with a 15degrees incline by a horse, as illustrated in the figure .
A.)If the overall retarding frictional force is 700N and the sled moves up the hill with a constant velocity of 5.0km/h , what is the power output of the horse? (Express in horsepower, of course.)
B.) Suppose that in a spurt of energy, the horse accelerates the sled uniformly from 5.0 to 17 in 6.0 . What is the horse's maximum instantaneous power output? Assume the same force of friction.