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by hn_throwaway_99 742 days ago
> I feel that introducing deformation or other energy dissipation to the equation kind of takes it out of the “high school physics” realm, right?

I don't think so. In my high school physics class I learned about both fully elastic and fully inelastic collisions. The math basically works out the same in the fully inelastic collision case, which I did here, https://news.ycombinator.com/item?id=40628932