Automotive Power n (a) If 8.00 hp are required to drive a 1800-kg automobile at 60.0 km/h on a level road, what is the total retarding force due to friction, air resistance, and so on?
(b) What power is necessary to drive the car at 60.0 km/h up a 10.0% grade (a hill rising 10.0 m vertically in 100.0 m horizontally)?
(c) What power is necessary to drive the car at 60.0 km/h down a 1.00% grade?
(d) Down what percent grade would the car coast at 60.0 km/h?