When the directive force is constant, the curve is a cycloid; under other conditions, spirals and other curves are described (see Mechanics) . [Please select]
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'There is a storm brewing; the cycloid won't save you; it's your turn for a bite from the Crocodile.' [Please select]
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With the aid of a system of tangents of which I first showed him the rule and the method of construction, my artist has obtained the ordinary cycloid, followed by the interior and the exterior epicycloid and, lastly, the same curves both lengthened and shortened. [Please select]
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