lever - A simple machine that rotates about its fulcrum, load - the resisting force, effort - force applied to move the resisting force, fulcrum - the point a lever turns around, first class lever - a lever with the fulcrum in the middle, second class lever - a lever with the load in the middle, third class lever - a lever with the effort in the middle, lever examples - see-saw, wheelbarrow, scissors ,

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