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  • tennis ball friction

    Dear Biomech-ers

    We are currently setting up an experiment to look into catching. We will
    need to be able to reconstruct theoretically the trajectory of a tennis
    ball in flight given initial conditions. To do this we need to know the
    forces acting on the ball as it moves through the air. If we apply Stokes'
    Law directly( without taking into account the nature of the ball's surface)
    , our calculations and preliminary measurements do not correspond. I am
    convinced we need to take into account the friction on the surface of the
    ball. Is anyone aware of any measurements or research done on this subject
    which could help us out? Basically I need the coefficient of friction of
    the felting on a tennis ball.

    Thanking you ... Thelma.



    Thelma COYLE UMR 6559 "Mouvement et Perception"
    Faculté des Sciences du Sport(UFR STAPS)
    Université de la Mediterranée(Aix-Marseille II)
    163 Avenue de Luminy, CP 910
    13288 Marseille cedex 9
    France

    tel. (33)[0] 4 91 17 22 00
    Fax (33)[0] 4 91 17 22 52

    e-mail : coyle@laps.univ-mrs.fr
    web : http://www.laps.univ-mrs.fr

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