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25 Cards in this Set
- Front
- Back
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CLASS 1 LEVER
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The fulcrum is in the middle of the lever arm.
_____________________ |
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CLASS 2 LEVER
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The load is in the middle of the lever arm.
_____________________ |
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CLASS 3 LEVER
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The effort is in the middle of the lever arm.
_____________________ |
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MEMORY TRICK FOR THE
3 TYPES OF LEVERS |
F L E
1 2 3 |
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THE FOUR PARTS OF A
LEVER SYSTEM |
lever arm
fulcrum load effort |
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THE RELATIONSHIP BETWEEN THE AMOUNT OF EFFORT NEEDED AND THE EFFORT'S DISTANCE FROM THE FULCRUM:
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As the distance between the effort
and the fulcrum increases, the effort needed to lift the load decreases. |
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SINGLE FIXED PULLEY
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Does not reduce the effort, but gives directional advantage.
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IN A PULLEY SYSTEM, THE EFFORT NEEDED FOR MECHANICAL ADVANTAGE IS
DEFINED AS: |
LOAD ---- NUMBER OF "ROPES" =
EFFORT EX.: 2.4 N --- 2 (ROPES) = 1.2 N |
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SIX SIMPLE MACHINES
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1. inclined plane ................. 4. pulley
2. lever .............................. 5. wedge 3. wheel and axle ................ 6. screw |
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2 BASIC TYPES OF PULLEYS
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fixed
movable |
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MECHANICAL ADVANTAGE
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MAKES WORK EASIER!!
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