Lever - a simple machine consisting of a beam or rigid rod pivoted at a fixed hinge,, Wheel and Axle - a simple machine, consisting of a wheel attached to a smaller axle so that these two parts rotate together, in which a force is transferred from one to the other., Pulley - a wheel on an axle or shaft enabling a taut cable or belt passing over the wheel to move and change direction, or transfer power between itself and a shaft., Incilned Plane - a ramp, is a flat supporting surface tilted at an angle from the vertical direction, with one end higher than the other, used as an aid for raising or lowering a load, Wedge - a triangular shaped tool, a portable inclined plane, and one of the six simple machines., Screw - a mechanism that converts rotational motion to linear motion, and a torque (rotational force) to a linear force.,

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