3 ms·
Nope. Consider the crumple zone of a trampoline, and the crumple zone of your knees. Now replace the trampoline with concrete.
by samatman 2y ago
Nope. Consider the crumple zone of a trampoline, and the crumple zone of your knees. Now replace the trampoline with concrete.
- s1artibartfast 2y agoPut your trampoline vertical have two people jump into each other. The trampoline doesn't deflect, and acts exactly like a concrete wall. The trampoline cant simultaneously deflect in opposite directions.
- samatman 2y agoYou're still failing to reason this through correctly. Let's stick to the central example, since the analogous situation didn't help you. Same amount of momentum, two collisions. In one, there is one crumple zone, we will assume the brick wall is completely undamaged, for the sake of simplicity. In the other, there are two crumple zones. All of the crumpling is dissipated energy. What doesn't get crumpled, goes into the driver's face. Clearly, the situation with two crumple zones is superior. There's a limit to how much energy can be absorbed by crumpling. With two crumple zones, that limit is 2x, with one, 1x. Therefore, damage to the driver or drivers is much worse in the brick wall scenario. For another analogy, picture a go-kart, with a half-meter block of styrofoam, hitting a brick wall. Now, picture the same go-kart, hitting at the same speed, but this time, there's a meter of styrofoam. That's the one-crumple and two-crumple scenarios.