The impact *speed* is doubled. If one car sat there unmoving, it would take an hour for the car at 60mph to reach that car while driving 60mph, if the cars started 60 miles away from each other. If each car was moving toward each other at 60mph, the moment of impact would occur at a rate of 120mph - in other words, it'd only take 1/2 hour before the two of them collided.
So the speed of impact is 120mph.
HOWEVER
Because each car takes 50% of the impact to itself, the resulting impact damage is still at the 60mph rate.
|