A pulley, also called pulley, carrucha, trochlear, sheaves or cheek simpleque is a machine used to transmit a force. This is a wheel, usually solid and grooved edge, which, with the help of a rope or cable that passes through the channel ("throat"), is used as the transmission element to change the direction of movement machines and mechanisms. In addition, forming joint-rigging or hoist, serves to reduce the magnitude of the force required to move a weight, ranging in speed.
As defined by the Goupillières Haton, "the pulley is the fulcrum of a moving rope is wound on her without a full turn" acting on one end the other the strength and power.
As defined by the Goupillières Haton, "the pulley is the fulcrum of a moving rope is wound on her without a full turn" acting on one end the other the strength and power.
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