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Differentiate between : 3. Pulley and wheel and axle


User Severun
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In plain English a pulley is a wheel with a groove or grooves along it's edge, a wheel is a disc that rotates on a shaft, and an axle is the shaft that a wheel rotates on. In mechanical terms a pulley and a wheel and axle are variations of the simple machine known as the lever.
User Tom Hunt
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