I watched a crash recently...it wasn't planned, where a Formula car doing around 130kph (logged by the car) hit a largely loose rock wall on the outside of the track. The left front wheel took most of the initial hit; bent back into the tube, turned the nose around and into the wall, witht he nose cone compacting well. The driver had no HANS device and got away with a fractured wrist. What I am interested in is the theoretical forces on the car and driver, but in physics at high school I was far more interested in the bodacious shape of Sharon...well never mind, another story there I feel. In short my physics is rusty enough to count as a base element.
However if force on the car can be calculated is it correct to use Favg d = - ½ mv2 or Average force times distance = negative half mass times (velocity squared). Can I assume added distance for the driver due to belt stretch and body compression as well as car crush?
Regarding the deceleration, what would be a reasonable figure for the time for the impact? The onboard G meter recorded around 60G, which suggests that the impact took two seconds - it looked liked it took far less, so I must be overlooking something. Any ideas?