energie_mecanique.py

Created by vovenastream

Created on March 21, 2024

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force conservative et ernergie 
potentielle 
  delta Epab=Ep(B)-Ep(A)=-Wab(Fc)
toute les force en joules 
Fc= force conservative

energie potentielle pesanteur:
  Epp=m*g*z
Epp en joule
m en kg
g en m.s-2
z en metre 

delta Epab=Ep(B)-Ep(A)=mgzb-mgza=-mg(Zb-Za)=-mg(Za-Zb)=-Wab(P)

force non conservatives: 
  depend du chemin suivi pas le 
  systeme

energie mecanique du systeme:
  Em=Ec+Ep
  Em=Ec+Epp

variation energie mecanique
  delta Emab=Em(B)-Em(A)=somme Wab(Fnc)
Fnc force non conservatrice

deltaEm=0 alos le systeme est isole
et pas de transfere energie

delta Em>0 pas isole et transfere 
energie avec exterieur

delta<0 dissipation energie 
sous forme energie thermique

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