Editing Lever (section)

{{Short description|Simple machine consisting of a beam pivoted at a fixed hinge}}
{{About|the simple machine}}
{{Infobox machine
| name           = Lever
| image          = Palanca-ejemplo.jpg
| caption        = Levers can be used to exert a large force over a small distance at one end by exerting only a small force (effort) over a greater distance at the other.
| classification = [[Simple machine]]
| industry       = 
| application    =
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| wheels         =
| tracks         =
| legs           =
| aerofoils      =
| axles          =
| components     = fulcrum or pivot, load and effort
| invented       = 
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| examples       = see-saw, bottle opener, etc.
}}
A '''lever''' is a [[simple machine]] consisting of a [[beam (structure)|beam]] or rigid rod pivoted at a fixed [[hinge]], or ''[[:wikt:fulcrum|fulcrum]]''. A lever is a rigid body capable of [[rotating]] on a point on itself. On the basis of the locations of fulcrum, load, and effort, the lever is divided into [[Lever#Types of levers|three types]]. It is one of the six [[simple machine]]s identified by Renaissance scientists. A lever amplifies an input force to provide a greater output force, which is said to provide '''leverage''', which is [[mechanical advantage]] gained in the system, equal to the ratio of the output force to the input force. As such, the lever is a [[mechanical advantage device]], trading off force against movement.