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| An
inverted cycloid is the brachistochrone, that is the curve between two
points in a vertical plane, along which a bead needs the shortest time
to travel. Click on start to watch a race between a bead on an inverted
cycloidal ramp and one on a linear ramp. |
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| Source: http://www.f.waseda.jp/takezawa/mathenglish/geometry/cyclo/cyc/cyc.htm |