February 2021 0 99 Report
Bonjour, pouvez-vous m'aider dans mon problème de physique seconde? Il s'agit de comparer deux satellites. Merci ! 3. Exprimer et calculer la valeur de la force gravitationnelle exercée par la Terre sur le satellite. Comparer la valeur obtenue avec la force gravitationnelle exercée sur HELIOS 2B dans la partie 1.
masse de la terre : Mτ = 6,0.10²⁴kg
rayon de la Terre : Rт = 6,4.10⁶m
masse satellite = 1000 kg
constante de gravitation universelle : G =6,67.10ˉ¹¹m³.kgˉ¹.sˉ²
h = 36 000 km soit 36*10⁶
On a :
Fs/t = G x mS x mT /(Rt + h)²
Fs/t = 6,67*10ˉ¹¹ x 1000 x 6,0*10²⁴ / (6,4*10⁶+ 36*10⁶)²
Fs/t = 40020*10¹³ / 1797,76*10¹²
FsTelecom/t = 2,226*10²N
Je compare la valeur obtenue avec la force gravitationnelle exercée sur HELIOS 2B :
FsHelios/t = 3,38.10⁴ N
FsTelecom/t = 2,226*10²N

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