Suppose the car in Problem 32 has a disk brake system. Each wheel is slowed by the friction force between a single brake pad and the disk-shaped rotor. On this particular car, the brake pad contacts the rotor at an average distance of 22.0 cm from the axis. The coefficients of friction between the brake pad and the disk are μs = 0.600 and μk = 0.500. Calculate the normal force that the pad must apply to the rotor in order to slow the car as quickly as possible.