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The Doorstop as a Wedge: Why a Small Taper Holds a Door A Bottle Opener and the Leverage Behind Its Handle Bicycle Gear Ratios: How Teeth, Rotation and Direction Relate The Pulley at a Window Blind: Guiding a Cord Around a Wheel Why a Screw Holds: Threads, Contact, and Turning Force

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Levers

See how a bar and a pivot change the direction or reach of a force.

LeversOct 17, 20265 min read

A Bottle Opener and the Leverage Behind Its Handle

Bottle opener leverage explains how the hook, bottle rim and handle work together, helping you understand the cap’s release and recognise when to reset the tool.