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The fulcrum is placed between the load and the effort.

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The load is placed between the fulcrum and the effort.

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The effort is placed between the fulcrum and the load.

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A simple pulley (also called fixed pulley) doesn’t increase the speed of the rope not reduce the effort needed to move a load.

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A movable pulley is a normal pulley but in this case the load is hanging from its axle.

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Driver wheel (rueda motriz o conductora ) is the wheel moved directly by a motor or a crank.

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Driven wheel (rueda conducida) is the one to which the motion is transmitted by means of friction existing

in the contact of both wheels.