state the use of the pulley
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Pulley is often used to lift heavy objects: Pulling down on one end of the rope creates an upward pull on the other end. Looping the rope over several wheels increases the upward force. With two wheels, you can lift something twice as heavy with the same force.
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A pulley is a simple machine that uses a wheel and rope to lift off heavy weight objects and move them around. ... The pulley system helps in lifting really heavy objects as it multiplies the force that is one need to apply to lift the weight, making the task easier.
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