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Lever
Levers can be used to exert a large force over a small distance at one end by exerting only a small force (effort) over a greater distance at the othe
Levers can be used to exert a large force over a small distance at one end by exerting only a small force (effort) over a greater distance at the other.
Archimedes lever, Engraving from Mechanics Magazine, published in London in 1824
Archimedes lever, Engraving from Mechanics Magazine, published in London in 1824
Simple lever, fulcrum, and vertical posts
Simple lever, fulcrum, and vertical posts
Steelyard weighing device from the late nineteenth century.
Steelyard weighing device from the late nineteenth century.
A simple pulley ABC in which a weight E is lifted by a force F.
A simple pulley ABC in which a weight E is lifted by a force F.
A single movable pulley BDC supports a weight G. A cord ABDCF wrapped around pulley BDC is anchored at A, and a force applied at F pulls upwards, thus
A single movable pulley BDC supports a weight G. A cord ABDCF wrapped around pulley BDC is anchored at A, and a force applied at F pulls upwards, thus raising pulley BDC and the weight G, functioning as a class II lever.