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This Concept Map, created with IHMC CmapTools, has information related to: 1R6_Levers, Levers (1R6) what about them? Levers are one of the basic tools that were probably used in prehistoric times. Levers were first described about 260 BC by the ancient Greek mathematician Archimedes (287-212 BC). A lever is a simple machine that makes work easier for use; it involves moving a load around a pivot using a force. Many of our basic tools use levers, including scissors (two class 1 levers), pliers (two class 1 levers), hammer claws (one class 2 lever), nut crackers (two class 2 levers), and tongs (two class 3 levers)., Fulcrum, Effort and Load Fulcrum between Effort & Load First Class Lever (1R6), Levers (1R6) what about them? it helps us do work with less effort, Fulcrum, Effort and Load Effort between Fulcrum & Load Third Class Lever (1R6), Levers (1R6) have important parameters of Fulcrum, Effort and Load, Fulcrum, Effort and Load Load between Effort and Fulcrum Second Class Lever (1R6)