You and your family take a road trip on a long holiday weekend. In a certain section of the trip where the road is particularly uneven, the car goes over a bump that is curved downward with a radius of 21.0 m. See diagram below. The mass of the car and its passengers is 2000 kg. (a) When the car is at the highest point of the bump its speed is 7.80 m/s. Determine the magnitude, in N, and the direction of the force exerted by the road on the car at this highest point. mag nitude N direction (b) If the speed at the highest point is above a certain maximum value the car will lose contact with the road. Calculate this maximum speed in m/s. m/s