Levers Lever is a simple machine that allows you to gain a mechanical advantage in moving an object or in applying a force to an object.

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Presentation transcript:

Levers Lever is a simple machine that allows you to gain a mechanical advantage in moving an object or in applying a force to an object.

Levers-First Class In a first class lever the fulcrum is in the middle and the load and effort is on either side Helps lift heavy weights using longer distances Think of a see-saw http://www.cosi.org/files/Flash/simpMach/sm1.swf

Levers-Second Class In a second class lever the fulcrum is at the end, with the load in the middle Think of a wheelbarrow

Levers-Third Class In a third class lever the fulcrum is again at the end, but the effort is in the middle Think of a pair of tweezers

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