If we have a smooth football in the shape of an ellipsoid, and that water runs down on its sides, can we trace the path of a water drop on it? For a sphere it seems easy because the force tangential to the surface is perpendicular to the radial vector whereas in the case of an ellipsoid it isn't. Any help?
2026-04-22 14:36:23.1776868583
Path traced by a water drop on an ellipsoid
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