a straight or curved rigid bar that is free to turn about a fixed point. - Lever, a grooved wheel that turns around an axle which is held in place by a mounting bracket. - Pulley, a plane titled at an angle, with one end higher than the other. - Inclined Plane, a spiral inclined plane. - Screw, an inclined plane or two inclined planes that meet each other to form a sharp edge - Wedge, a machine that has a small disk or shaft called an axle that is attached to a wheel. - Wheel and axle,

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