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The Bizarre Behavior of Rotating Bodies
Veritasium
Veritasium explains the Dzhanibekov effect, also called the tennis racket theorem, where a spinning object flips unexpectedly about its intermediate axis. The video gives an intuitive account of the underlying rotational dynamics, drawing on Terry Tao's explanation and the original papers.
HN people cite it as the clearest layperson-friendly explanation of rotational instability whenever spinning bodies, tumbling objects or axis shifts come up.
6 Hacker News mentions · 2020–2025