One, if you only count the exact second fracture when the crash happens. Multiple, if you count all the collisions directly resulting from a crash. For example from ripped off parts of the vehicle fall on the ground, the person driving hitting the wheel, or the objects inside the car colliding together and falling to ground. One could say "as many collisions in a crash as there are individual moving objects"
At least three 1. Car with object 2. Person with car 3. Internal organs with persons body If the car bounced off an object and hit something else that would be more collisions.
Safety researchers state there are three collisions in a motor vehicle crash. This would be the vehicle striking an object as the first, the second would be the occupants hitting the interior or exterior of the vehicle, and the third would be the internal organs of the occupants striking the internal structure of the body.
A crash involving a motor vehicle or aircraft
Both. Crash testing would usually be done by both an indoor laboratory or on a closed road course, depends on the motor vehicle company.
Chances are 20%