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Mechanisms

Follow the linked parts that turn one kind of movement into another.

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The Doorstop as a Wedge: Why a Small Taper Holds a DoorMechanismsA Bottle Opener and the Leverage Behind Its HandleLeversBicycle Gear Ratios: How Teeth, Rotation and Direction RelateGearsThe Pulley at a Window Blind: Guiding a Cord Around a WheelPulleysWhy a Screw Holds: Threads, Contact, and Turning ForceFasteners