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| When a force moves an object |
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| Any of the six elementary devices that provide mechanical or other advantage. |
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Two wheels of different diameters attached and rotating on the same axis. |
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| A wheel with a grooved rim in which a rope can run to change the direction of the pull and so lift a load. |
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| [image]A pulley attached in position above a load to be lifted. |
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A pulley attached to a load that is being lifted. |
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| Two or more pulleys working together. |
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| [image]A grooved wheel used in a pulley. |
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| a toothed wheel that engages another toothed mechanism in order to change the speed, direction, or force of a transmitted motion |
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| [image]the toothed gear attached to the crank of a bicycle, which drives the chain. |
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| [image]a gear located between driver and driven gear. It changes the direction of the driven gear. |
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| [image]a gear system composed of a round gear (the pinion) and a flat gear only (the rack). It changes turning motion to back-and-forth motion. |
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| [image]the simplest, most common type of gear, generally in the form of a cylinder or disk, with teeth around its circumference. The purpose of the teeth is to mesh with similar teeth on another mechanical device, possibly another gear wheel, so that force can be transmitted between the two devices in a direction tangential to their surfaces. |
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| [image]a tube-shaped gear with often just one tooth that twists along and around its length. |
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| a flexible loop of tough material, used to transfer force and motion between some kinds of pulleys |
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| a gear with teeth on sloping side, it transfers force and motion from one plane to another |
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| a gear or pulley that is turned by another gear or pulley |
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| the gear or pulley in a train that is turned by a motor or crank. It turns all the other gears or pulleys in the train |
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| a unit used to measure force. N is the symbol. |
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| a wheel with sprockets around its outer edge or rim. They are pulleys that work with chains. |
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