Comment Re:How did it react during the accident? (Score 1) 549
Hmm. I get what you are saying, but I'm not down with your analysis. There will be a certain amount of energy transferred by the impact. The injurious portion of that impact is during the impulse strike of the two cars. Crumple zones, for instance, work by spreading the impulse experienced by the cabin across a larger time. If some of that same energy goes into accelerating the car and then being dissipated later by braking all that is doing is spreading the total energy dissipation across a larger time window. It should lower the impulse transferred to the cabin by using some of the energy to accelerate the rest of the frame as well.yes, you get slightly more acceleration due to the whole car accelerating, but less total impulse due to the partitioning of the energy transfer.
Not that I think there's any significant difference, since in any serious rear end collision the total acceleration will vastly overwhelm the strength of your legs to press the brake pedal.