What is a pulley?How does it help us?
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A pulley is a wheel with a groove along its edge, that holds a rope or cable. Usually, two or more pulleys are used together. When pulleys are used together in this way, they reduce the amount of force needed to lift a load. A crane uses pulleys to help it lift heavy loads.
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pulley is the wheel like substance used to hold the objects r mases.
they are used to find tension in the string masses of the objects
they are used to find tension in the string masses of the objects
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