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How to Update
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0:51
La science du hula-hoop a montré que le corps en sablier (qu'on appelle hyperboloïde) permet au cerceau d'être en lévitation stable, c’est-à-dire qu'il ne descend ni ne monte intempestivement. Les autres géométries testées (cylindre et cône) n'offrent pas un point d’équilibre stable sans intervention extérieure. Les auteurs ont souligné que la forme de « hanches marquées taille étroite » rend les choses naturellement stables. Toutefois, cela ne signifie pas qu’il est impossible de faire du hula-
28.5K views
Jan 5, 2025
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Professeur Fabrizio Bucella
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