18-12-2012, 06:05 PM
TYPES OF LEVER
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INTRODUCTION
A lever is a simple machine used to reduce the amount of effort it would take to lift a load or reduce the amount of effort needed to do work.There are 3 types of levers: Class 1, Class 2, and Class 3. The effort needed to lift a load is measured inNewtons.
Levers can provide Mechanical Advantage by reducing the effort needed to lift a load. The closer the fulcrum is to the load, the less effort is needed to lift the load. The load does not move a great distance.