Test: High School Physics

1.

You are a witness in a court case involving a car accident.  The accident involved car A of mass  which crashed into stationary car B of mass .  The driver of car A applied his brakes  before he crashed into car B.  After the collision, car A slid  while car B slid 3.  The coefficient of kinetic friction between the locked wheels and the road was measured to be .  What was the velocity of car A before hitting the brakes?

 

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