Mouvement: dans un champ de pesanteur uniforme-BAC Flashcards by Adaora ILOANUSI

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application 2e loi de Newton

ΣF = ma
P = mg = m*a
a = g
az(t) = -g

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Em =

Ec + Ep
(en J)
Ec = 1/2mv²
Ep = mgz

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Théorème de l’énergie cinétique

ΔEc = Ec(B) - Ec(A) = ΣWab(F)
Wab(P) = mg(zA-zB)
= mgh

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Mouvement: dans un champ de pesanteur uniforme-BAC Flashcards

(3 cards)