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The Simple Physics Trick That Helps Trains Stay on Their Tracks

posted by Jason Kottke   Oct 04, 2021

Train wheels do not sit completely flat on the tracks — they’re designed with a slight taper that increases the stability of the train and allows the train to go around curves without any of the wheels skidding. In this short video, Tadashi Tokieda explains how those conical wheels keep trains on track.

See also Richard Feynman’s explanation of this and this science project at Scientific American. (via the prepared)