the friction between the tires of a car and a flat road provides the centripetal force for a turn. for a 2000 kg car traveling at 30 m/s on a curve of radius 120 m: a. calculate the normal force on the car from the road. b. calculate the centripetal force required to turn the car safely. c. calculate the minimum coefficient of static friction between the tires and road for the car to turn safely. d. ice on the road reduces the coefficient of friction to 0.09. what is the maximum speed of the car to turn safely?.