2. BGRS ITC
3. Videos des machines de Rube Goldberg
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Driver and driven |
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Speed ration and direction of rotation |
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Direct lift - 500g = 50N |
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Fixed pulley - Changes direction of the force, MA = 1 |
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Movable pulley - MA of 2 = Force advantage |
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Mixed Pulley - MA = 2, Force advantage and changes direction of the force |
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Block and tackle - MA <1 - Force advantage. Every time the cord goes around the movable pulley the mechanical advantage doubles. |
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The block & tackle pulley that went wrong! |
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Four examples combining pulleys |
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Gears and chains |
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Wheel/axle and Screw (inclined plane) |
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Wedge = inclines plane |
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3rd class lever and winch |