energetiques_mecaniques.py

Created on March 28, 2024

632 Bytes

énergie cinétique Ec
     1        2 
Ec = - x m x v
     2

le travail du poids pour un déplacement de A à B
      ->
 WA→B(P) = m ∗ g ∗ (zA − zB)


le travail de la reaction support R  pour un déplacement de A à B
      ->   -> ->        ->    ->
 WA→B(R) = R.AB = 0 Car R  et AB   sont perpendiculaires 


le travail de la force frottement f  pour un déplacement de A à B
      ->   -> ->       
 WA→B(f) = f.AB = f x AB x cos(alfa)
            



Théorème de l’énergie cinétique
                            ->
Delta Ec = EcB − EcA = WAB (F)


l’énergie mécanique Em
Em = Ec + Ep

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