A Class 2 pulley

A Class 2 pulley

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Credit: CAROL & MIKE WERNER/VISUALS UNLIMITED, INC /SCIENCE PHOTO LIBRARY

Caption: A Class 2 pulley has a free or movable axle, meaning the pulley is free to move in space. A movable pulley multiplies the lifting force by a factor of two, giving it a mechanical advantage of 2.

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Keywords: axle, blue, blue background, brown, class 2, close up, energy, force, free axle, illustration, leverage, lift, mechanical advantage, movable axle, physics, power, pulley, ropes, side view, simple machine, work

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