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Mechanical advantage for the lever
Distance from the fulcrum to effort divided by the distance from fulcrum to resistance
Second class lever
The fulcrum is positioned at one end of the bar and the resistance is between the fulcrum and the effort
Third class lever
The fulcrum is at one end of the bar and the effort is between the fulcrum and the resistance
The length of a straight line that travels from one side of a circle to another and passes through the center of a circle
Mechanical advantage for the wheel and axle
Diameter of the wheel divided by the diameter of the axle
Block and tackle
Multiple pulley system. Mechanical advantage for pulleys in a block and tackle = numbers of pulleys used
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