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barbie2005girl
@barbie2005girl
March 2021
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Bonsoir les amis je n arrive pas et j ai besoin d aide
Un ressort a une longueur à vide lo = 15 cm. Quand on accroche à son
extrémité une masse m = 150 g sa longueur est lf = 17 cm.
1) Faire un schéma de la situation.
2) Faire le bilan des forces et les représenter. Etablir une relation entre ces forces.
3) Déterminer la raideur du ressort k.
4) Déterminer la longueur l’ du ressort quand on y accroche une masse m’ = 525g
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