I didn't vote you down, but you cannot assume the cars are of identical size and mass, or indeed that it's a car at all. Hit a truck at 35, while he is also doi

I didn't vote you down, but you cannot assume the cars are of identical size and mass, or indeed that it's a car at all. Hit a truck at 35, while he is also doing 35, and you'll feel a 70mph effect all right. For a few milliseconds. Unfortunately, poles, especially old ones, do not have as much give as one would like, and large trees have basically none. Plus, their narrow aspect is a very bad thing to hit; cars are designed to collide with large, flat, wide objects and to crumple accordingly to wash off energy. Hitting an immoveable narrow object is outside this design consideration and cars have a nasty tendency to wrap around it.