Question

The big downhill run on the Diamondback roller coaster at King's Island is inclined 80 ∘ below horizontal and the the total drop in height is 49.4 m (162 ft).

a) If the coefficient of kinetic friction for going along the track is μk=0.26 , what is the magnitude of the friction force on a 1800-kg set of cars? (Express your answer to two significant figures and include appropriate units)

b) How much work is done on the set of cars by friction as it goes down the hill?

c) Taking the speed at the top to be zero, how fast are the cars moving at the bottom of the hill?

Answer 1