The car has been in collision with the kerb at the side of the road Possiblly resulting in suspension and chassis damage being caused to the vehicle
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It all depends on how you define the word, collision. From a medical standpoint, there is a collision every time your foot hits the ground, while walking or running, for instance.
Statistically speaking, you would be involved in a collision about ten times.
Statistically speaking, you would be involved in a collision about ten times.
We have to assume that both bodies are initially moving along the same straight line in opposite directions, so the collision is "head on". We also have to assume that the collision is "elastic", meaning that none of the original kinetic energy is lost to heat. The final momentum is 20 Kg-m/s in the direction opposite to the original 80 kg-m/s motion.