I recently asked myself the following question: one compares: a) a VW Golf V with 60 km/h (approx. 1300 kg) against a concrete wall b) two VW Golf V with 60 km/h frontal against each other Do both scenarios have the same effect or is the golf against the wall after the crash even better in shot than if my two golfs frontal against each other??? the common sense would say that the two golfs must be more deformed against each other because 2×60 km/h but clearly more rumms produced as only 1×60 km/h… on the other hand, if you consider the whole with the energy conservation sentence, both scenarios would have to go out about the same, because: if you crash a golf against a wall, there is a lot of kinetic energy available, which has to be dismantled. if you crash two golfs against each other, the double amount of energy is present, however, there is also twice as much bleak and knauchzone available to dismantle it again, so it actually ends in that every car is e degrades its own energy and thus results in the same effects as in a crash against a wall. what is your opinion about this??? (sry, actually wanted to write “physical question to crash tests”)