I know next to zero material science, but I would think there's not much motion going on, and that it's more that once you're past the yield strength, stress causes nonlinear increases in strain, and you get hysteresis (i.e. permanent deformations). Then over time those deformations add up to a weaker structure that eventually fractures. As long as you stay within or close to the linear regime, there's little to no permanent damage. I imagine it's more of a chemical process (i.e. you're damaging the bonds/lattice structure of a material), but I don't know.

> the acceleration of the acceleration (jounce)

Amazing. I had always learned it as the snap. Learn something new every day

https://en.wikipedia.org/wiki/Fourth,_fifth,_and_sixth_deriv...

I haven't been seeing electric vehicles weighing 500kg more. Closer to 500lbs more. Offset by the drivetrain.

Increasing vehicle weight by about 15% would be 75% more damage per passenger vehicle. Which is not nothing, but for comparison, those 5000 pound trucks are doing almost 8 times as much road damage as a midsized sedan by weighing 2/3 more.

But let's say you're right and the sedans weigh 30% more instead of 15% more, then it's about 2.8x the damage of an ICE. Trucks are still doing more damage than 3 battery electric vehicles.

Honestly the weight of these things needs to come down over time. But you need infrastructure to do that. Lighter batteries don't just materialize out of thin air. Getting battery weight down increases range. Which can either make a car with better range, or let you shrink the battery another 5%.

Yes, but that's nothing compared to the 3,000 times more damage that a semi-truck hauling your groceries does.