An accident involved a 2000 kg truck that hit astationary 1000kg car stopped at a red light. The driver of Truckapplied his brakes 15m before he crashed into the car. After collision, the vehicles did not lock. The truck slide 15m while thecar slid 30m. The coefficient of kinetic friction between thelocked tires and the road is 0.6
a. Find the speed of theTruck just before driver applied the brakes.
b. Was the driver speeding?(Speed limit is 55 mph)
Hint-split process into three phases:
1. Braking before collision, 2. Collision itself, 3. Coming to complete stop after collision.