keplersatellites.py

Created by mbtp07

Created on May 10, 2022

701 Bytes

Bac


1) Kepler
Periode de Revolution T= Temps pour faire le tour de son orbite
1er loi : l'orbite forme une ellispe
2eme loi: segment reliant soleil a la planetes ont des aires = a temps =
3eme loi:T^2/a^3=k avec T en s et a rayon en m
k=4pi^2/G*M

2) Mouvements circulaires:
  Fa/b=m*a=-g*(Ma*Mb/r^2)*vecteur n
  donc a=G*M/r^2*vecteur n
  planetes ou satellites a une vitesse constante donc
  a=(v^2/r)*vecteur n
  
  Vitesse satellite :
    a=GM/r^2=v^2/r donc v=sqrt(GM/r)
    les masses en kg et longueur en m 
    
  Periode de Revolution:
    v=2pi*r/T=sqrt(GM/r)
    donc T=2pi*sqrt(r^3/GM)
    
  T^2=4pi^2*(r^3/GM)
  donc T^2/r^3=4pi^2/G*M on retrouve la troisieme loi
  

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