collisions against cars and objectcs

[Hazard]

i want to know exactly how the collisions are made and exactly how do weight and elasticity affect the collision. I mean, does elasticity matter in collisions against cars? or only against other objects?

i also want to know how the game decides in which direction and speed each car bounces

thanks for the answers!

[Janne]

I mean, does elasticity matter in collisions against cars?

For both cars and objects. For other questions I have no answers.