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perroud 3e E meca

3e Energie mécanique

QuestionAnswer
Energie Cinétique Ec (formule) 1/2 * m * v2 (en Joule) m = masse en kg v = vitesse en m/s
Energie mécanique (formule) Ec + Ep (en Joule)
Vitesse (formule) d/t (en m/s)
Distance (formule) v*t (en m)
Temps (formule) d/v (en s)
Rédaction calcul 1. Rappel de la formule et des données 2. calcul numérique 3. Phrase réponse avec unité
L'Energie mécanique d'un système est constante (si et seulement si...) il y a absence de frottements (donc ...)
L'Energie cinétique dépend de deux paramètres la masse et la vitesse
Conversion de vitesse m/s km/h
Created by: eraxit
 

 



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