In: Physics
You have been hired as an expert witness in a case involving an automobile accident. The accident involved car A of mass 1500 kg, which crashed into stationary car B of mass 1100 kg. The driver of car A applied his brakes 15 m before he skidded into car B. After the collision, car A slid 18 m while car B slid 30 m before coming to rest. The coefficient of kinetic friction between the locked wheels and the road is 0.50. Show that the driver of car A was exceeding the 55 mi/h (90 km/h) speed limit before applying the brakes.