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LEVER, , SIMPLE LEVER, , COMPOUND LEVER, , Government Polytechnic Kenaura, Sultanpur @ Hari om, , A lever is a rigid bar (straight, curved or bent) and is hinged at one, point. It is free to rotate about the hinged end called fulcrum. The, common examples of the use of lever are crow bar, pair of scissors,, fire tongs, etc., LEVER, , 1. CLASS-I LEVER, 2. CLASS-II LEVER, 3. CLASS-III LEVER, 6

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CLASS-I LEVER, In this type of lever, the effort and load act on the opposite sides of, the fulcrum.,  EX.-Seesaw, Scissors, pliers etc.,  MA<1, MA>1, MA=1, , , Government Polytechnic Kenaura, Sultanpur @ Hari om, , 8

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CLASS-II LEVER, In this type of lever, the effort and load act on the same side of the, fulcrum. But effort acting at a greater distance than the load. Or in, other words, load is acting between the fulcrum and the effort.,  EX.-nut crackers, wheel barrows, bottle Openers etc.,  MA>1, , , Government Polytechnic Kenaura, Sultanpur @ Hari om, , 9

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CLASS-III LEVER, In this type of lever, the effort and load act on the same side of the, fulcrum. But load acting at a greater distance than the effort. Or in, other words, effort is acting between the fulcrum and the load.,  EX.-human body arm, spoon etc.,  MA<1, , , Government Polytechnic Kenaura, Sultanpur @ Hari om, , 10