Set or Class 1 pulleys have a fastened shaft. That is, the shaft is “set” or anchored in place. A fixed pulley is a pressure used to adjust the course of the rope (named a belt simply because it can make one particular change). Set pulleys have mechanical benefits of mounted pulleys. Active pulleys or 2-phase pulleys have free shafts. That is, the axis can shift “freely” in place. Moving pulleys are used to change forces. Active pulleys have the mechanical benefit of two pulleys. That is, if one finish of the rope is stationary, pulling the other conclude of the rope will exert two times the pressure on the object connected to the pulley. A composite pulley block is a blend of a mounted pulley block and a movable pulley block. Blocks – Blocks are composite pulleys where multiple pulleys are mounted on each axle, further introducing to the mechanical gain. Pulleys can modify the direction of the force.
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Tension pulley

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