The Amazing Physics of a Human Finger Snap

The Amazing Physics of a Human Finger Snap
AP Photo/Susan Walsh

It all happens in a snap. New high-speed video exposes the blink-and-you’ll-miss-it physics behind snapping your fingers.

The footage reveals the extreme speed at which the gesture occurs, and shows that friction plus the compressibility of the finger pads are key to humans’ ability to snap properly, researchers report November 17 in Journal of the Royal Society Interface.

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