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hal.structure.identifierCentre de physique moléculaire optique et hertzienne [CPMOH]
dc.contributor.authorKLIAVA, Janis
hal.structure.identifierCentre de physique moléculaire optique et hertzienne [CPMOH]
dc.contributor.authorMÉGEL, Jacques
dc.date.created2009-12-17
dc.date.issued2010-07-01
dc.identifier.issn0143-0807
dc.description.abstractEnEven though the buoyancy force (also known as the Archimedes force) has always been an important topic of academic studies in physics, its point of application has not been explicitly identified yet. We present a quantitative approach to this problem based on the concept of the hydrostatic energy, considered here for a general shape of the cross-section of a floating body and for an arbitrary angle of heel. We show that the location of the point of application of the buoyancy force essentially depends (i) on the type of motion experienced by the floating body and (ii) on the definition of this point. In a rolling/pitching motion, considerations involving the rotational moment lead to a particular dynamical point of application of the buoyancy force, and for some simple shapes of the floating body this point coincides with the well-known metacentre. On the other hand, from the work–energy relation it follows that in the rolling/pitching motion the energetical point of application of this force is rigidly connected to the centre of buoyancy; in contrast, in a vertical translation this point is rigidly connected to the centre of gravity of the body. Finally, we consider the location of the characteristic points of the floating bodies for some particular shapes of immersed cross-sections. The paper is intended for higher education level physics teachers and students.
dc.language.isoen
dc.publisherEuropean Physical Society
dc.title.enNon-uniqueness of the point of application of the buoyancy force
dc.typeArticle de revue
dc.identifier.doi10.1088/0143-0807/31/4/005
bordeaux.journalEuropean Journal of Physics
bordeaux.page741-762
bordeaux.volume31
bordeaux.issue4
bordeaux.peerReviewedoui
hal.identifierhal-00505464
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00505464v1
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