回複：用動量定理計算倆車正麵碰撞安全性---軟車，硬車，哪個更安全？

this is pure bullshit.

You were wrong right from the beginning. Your whole writing was based on a false premises: that is, in real life, the two vehicle collision is 100% elastic.

Tell you what: the risk of you dying/get seriously injured in a two vehicle/multivehicle accident is inversely proportional to the weight and structural integrity of your car.

You are either:
1) intentionlly misleading, or
2) appallingly ignorant;