A 1937 GM-produced film explaining how the automobile differential lets wheels turn at different speeds around a corner. It uses clear animations and cutaway demonstrations to build the idea from first principles.

Why Hacker News readers recommend it: Held up as a marvel of pedagogy and the best explanation of differentials, recommended again and again.

“this video explaining differentials is from 1937 and is a marvel of pedagogy”

View the original HN discussion

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