Simple Machines
Published on Nov 19, 2015
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PRESENTATION OUTLINE
SIMPLE MACHINES
BY MJ JOHHSON
Pulley
A pulley is 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 to raise heavy weights
Example: flag pole
Wedge
A wedge is a piece of used 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
Example: knife
Lever
A lever is a rigid bar resting on a pivot, used to help move a heavy or firmly fixed load with one end with pressure is applied to each other
Example: seesaw
Photo by kosabe
Screw
A screw is a short,slender,sharp-pointed metal pin with a raised helical thread running around it and a slotted head,used to join thing like breaking through wood
Example: scissors
Photo by JusDaFax
Wheel and Axle
A wheel and axle is a simple lifting machine consisting of a rope the unwinds from a wheel onto a cylinder drum or shaft joined to the wheel to provide mechanical advantage
Example: fair wheel
Photo by Sprengben [why not get a friend]
