Spiderman is supposed to be smart, so why doesn't he seem to understand the concept of whiplash?

Whiplash is simply that a small move at the end of a line can cause a much larger movement at the end. If Gwen didn't die on impact with the ground, science shows up whiplash would have snapped her neck. She actually had a higher chance of survival by hitting the ground than if Peter's web had caught her. As one of the smartest kids in his universe, he should have realized that. Also so many problems with him saving people seem like a proper knowledge of science and cause and effect would have made the job easier.

Spiderman is supposed to be smart, so why doesn't he seem to understand the concept of whiplash?
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