Mechanical Reasoning – Beyond the Reference Range

How does a zipper work? • The Zipper Tunnel Investigation

Forest-green canvas backpack with a brass zipper beside a magnifying glass, thread spool, pencil, and open field notebook showing hand-drawn zipper diagrams on a warm cream work surface.

How does a zipper work? • The Zipper Tunnel Investigation • Follow a slider in slow motion to see two element rows become one meshed chain, then reverse the trip.

Forward the Curiosity: