Unfortunately I don't know time intervals on the crash. Being forensics, it's based entirely on what was seen after the crash. This means knowing surfaces, materials, and being able to tell that the car slid half the distance and then rolled the remainder. Mass of the car is known, distances are...
I'm trying to figure out what information I'm lacking that I need and what formulas to use in order to calculate velocities and accelerations in a car crash. For the first part of the crash, it was a sideways slide in grass, and I've got that part. Then the side wheels catch and the car starts...