a 2000-kg car skidded for a total distance of 18 m (about 60 feet) before coming to a stop. assuming that the coefficient of kinetic friction between the tires and the road is 0.500, how fast was the car going when the driver slammed on the brakes (thereby locking the wheels)? group of answer choices 9.8 m/s 7.5 m/s 17.7 m/s 4.7 m/s 13.3 m/s