Simple Machines - Lever lifts
Lever lifts
A lever is any bar-type object free to move or pivot about at a fixed point. The point at which the lever pivots is called the fulcrumThe point at which a lever arm pivots.. A downward motion at one end results in an upward motion on the opposite side.
In a lever, the fulcrum's relationship to its load and the force applied, or effort, determines the work of the lever. Levers are categorized
by where the fulcrum is located in relation to the load and effort. There are three basic types of levers. A first-class lever has its fulcrum placed between its load and the effort. One end is forced down and the other end moves up. When the fulcrum is in the center of the lever, the amount of effort pushed down on one side equals the amount of load lifted on the other side. If the distance from the effort to the fulcrum increases by two, then only half as much...
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