Wheel and axle rail road wheels.  Screw a screw.  Lever leval one seesaw.  Lever leval two wheel barrel.  Lever leval three tweezers.  Pulley net reel on a ship.   Inclined plane slicky slide.         Mechanical advantage output force \ input force.        Ideal mechanical advantage length of incline\ height of incline.         Ideal mechanical advantage radius of input \radius of out put.         Ideal mechanical advantage distance from input force to fulcrum\ distance from output force to fulcrum

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