What is pulley????????
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a wheel with a grooved rim around which a cord passes, which acts to change the direction of a force applied to the cord and is used to raise heavy weights.
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pulley is wheel that has a grooved track for the rope, belt or chain to move through it. A pulley is a circular lever, with the wheel rotating freely on the axle. A fixed pulley is fixed firmly attached to one spot, and does not move around.
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