Automobile Accident Analysis You are called as an expert witness to analyze the following auto accident: Ca B, of mass 1900kg was stopped at a red light when it was hit from behind by car A, of mass 1500kg. The car locked bumper during the collision and slid to a stop with brakes locked on all wheels. Measurements of the skid marks left by the tires showed them to be 7.15m long. The coefficient of kinetic fiction between the tires and the road was .65
a) What was the speed of car A just before the collision?
b) If the speed limit was 35mph, was car A speeding, and if so, by how many miles per hour was it exceeding the speed limit?
c) Explain why we can classify the collision as completely inelastic
d) Calculate the total kinetic energy before and after the collision