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work and simple machines
an inclined plane that moves
wheel and axle
two circular objects of different sizes that are attached so that they rotate together
an inclined plane wrapped around a cylinder
pivot point of a lever
a flat, sloped surface
when a force produces motion in the direction of the force
the rate at which work is done
the output force divided by the input force
any rigid rod or plank that pivots about a point
a grooved wheel with a rope or chain that changes the direction of the force