Discuss the below:
Linear Momentum and a Toyota and Cadillac Collision
Q: A 0.90X10^3 kg Toyota collides into the rear end of a 2.2X10^3 kg Cadillac stopped at a red light. The bumpers lock, the brakes are locked, and the two cars skid forward 4.0 m before stopping. The police officer, knowing that the coefficient of kinetic friction between tires and road is 0.40, calculates the speed of the Toyota at impact. What was that speed?