The problem is: The red car rear ended the blue car(who was stopped at a stop sign, with handbrake partly on) the cars ended up seperately on the other side of the intersection. We are asked to explain what happened, was the driver of the red car speeding etc. I am unsure how to start this problem. We are not given any velocities. The red car has skidmarks starting from the exactly place of collision with the blue car. What formula would u use? How would i start it? To me it seems that we don't have enought info.