Suppose that a 1800 kg car passes over a bump in a roadway that follows the arc of a circle of radius 20.8 m
(a) What force does the road exert on the car as the car passes the highest point of the bump if the car travels at 40.0 km/h? (Neglect friction.)
(b) What is the maximum speed the car can have without losing contact with the road as it passes this highest point?