The 6 Simple Machines

By Clay Twymon

Lever

A simple machine consisting of a rigid bar pivoted on a fixed point and used to transmit force, as in raising or moving a weight at one end by pushing down on the other

Wheel and Axle

Wheel and Axle, a simple machine consisting of a wheel (or crank) and an axle that turn on the same axis. Steering wheels, doorknobs, and screwdrivers are wheel-and-axle devices. A crank replaces the wheel in devices such as windlasses, bicycle pedals, and hand drills

Pulley

A wheel with a grooved rim around which a cord passes. It acts to change the direction of a force applied to the cord and is chiefly used (typically in combination) to raise heavy weights.

Screw

A short, slender, sharp-pointed metal pin with a raised helical thread running around it and a slotted head, used to join things together by being rotated so that it pierces wood or other material and is held tightly in place

Inclined Plane

a plane inclined at an angle to the horizontal

Wedge

A piece of wood, metal, or some other material having one thick end and tapering to a thin edge, that is driven between two objects or parts of an object to secure or separate them