The speed of a car increases uniformly with time from 50 km/h at A to 100 km/h at B during 10 seconds. The radius of curvature of the hump at A is 40 m. If the magnitude of the total acceler- ation of the car's mass center is the same at B as at A, compute the radius of curvature pg of the dip in the road at B. The mass center of the car is 0.6 m from the road. Ans. PB = 163.0 m 40 m 0.6 m B PB