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  • Ancien Responsable Matière
  • Solution
Posted

Bonjour @Painchooc!

Alors tu as le bon raisonnement, auquel je vais ajouter quelques précisions pour t'éclairer :

S = F/P = (70 . 9,81) / 9.105 = 686,7 / 9.10\simeq 76 . 10-5 

7,6 cm² = 7,6 . 10-4 m² = 76 . 10-5   /!\ au conversion des unités au carré

 

En espérant t'avoir éclairé, si tu as d'autres questions n'hésite pas !

 

  • Ancien Responsable Matière
Posted
il y a 6 minutes, Painchooc a dit :

ok super merci !

De rien !

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