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Notion de force

vendredi 30 janvier 2009

16 Messages de forum

  • Notion de force

    21 janvier 2011 08:35, par khady gueye

    2 :

    En précisant l’échelle utilisée dans chaque cas, représenter les vecteurs forces suivantes :

    1. Une force horizontale, orientée de droite à gauche, et de valeur F=18,5 N.

    2. La tension exercée par l’extrémité inférieure d’un fil incliné d’un angle de 20° par rapport à la verticale, et de valeur égale à 29 N.

    3. La réaction exercée sur un livre par un plan incliné d’un angle de 15° avec le plan horizontal. Dans les conditions de l’étude, cette force est dirigée suivant la verticale et sa valeur est égale à 4,9 N.

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