1. The problem statement, all variables and given/known data An SUV is travelling north-east bound slightly downhill with a speed of 30kph around a blind curve then a sedan travelling south-west encroached an oncoming traffic with a speed of 80-90kph. There is a head-on collision and the point of rest of both vehicles is in south-west lane / just on the shoulder of the sedan lane where they are parallel to each other. There were no skid marks. How did both cars manage to rest at the south-west lane? 2. Relevant equations P = m x v = mv 3. The attempt at a solution I'm not a physicist and I'm trying to help my friend who had an accident. Base on my research and my attempt grasp on physics an inelastic head-on-collision happened upon the principal impact. Both cars has an equal momentum upon the collision however because it's downhill and considering the mass of the SUV, the SUV pushed the sedandownwards. The sedan made a clockwise rotation before both vehicles reach the point of rest.