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QCM 6 TD physique


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Salut @Filou

 

Pour rompre la glace on sait qu'il faut appliquer une pression de 9.10^5 Pa.

On va donc appliquer une force F = m.g = 2x4,6 x 9,81 = 90,252 N.

Cette force a été appliquée sur une surface S de 100 mm x 1 mm = 100 mm^2 = 10^-4 m^2.

Donc la pression appliquée est de P = F/S = 90,252 / 10^-4 ce qui fait environ 9.10^5 Pa.

 

C'est plus clair ? 🙂

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