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Simple Machines.(Brief Article)
What do you think of when you hear the world machine? Do you think of something big and loud? Something that runs on electricity? Most people do. But a machine is anything that makes work easier. Look at the simple machines below. They are the basis of all other machines that people use.
Wheel
Lever
Wedge
Screw
Pulley
Inclined Plane
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Source: HighBeam Research, Simple Machines.(Brief Article)