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All terms in this list:

simple machine: have one or two parts and help make work easier

wedge: made from two slanted sides that end in a sharp edge

lever: it's a stiff bar that rests on a support called a fulcrum

inclined plane: a ramp,a slanted surface that connects a lower level to a higher level

screw: an inclined plane wrapped around a center post

wheel & axel: a round wheel attached to a post called an axel

pulley: it changes the direction of motion in an object to which a force is applied

force: a push or a pull

motion: movement

balanced force: a two forces acting in the opposite direction the object does not move

unbalanced force: forces that cause a change in motion the object does

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