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The dynamics of a rotating ellipsoid

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arxiv 1305.3898 v1 pith:42OVWD5W submitted 2013-05-16 physics.ed-ph physics.class-ph

The dynamics of a rotating ellipsoid

classification physics.ed-ph physics.class-ph
keywords dynamicsellipsoidmotionphenomenonspinningsurfacearticleaxis
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An interesting physical phenomenon, which contradicts our common sense, is concerned with the dynamics of motion of a spinning ellipsoid in a non smooth surface. A hard-boiled egg spinning on a table with a rough surface is an example. In this article, we present a theoretical explanation, of the dynamics of motion of this ellipsoid, that describes the axis raising phenomenon, from the horizontal to the vertical. The equations of motion were obtained with Lagrangian formalism.

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