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Sagot :

LEAFE

Bonjour,

Ec = 1/2 x m x v²

Exercice 5 :

2)

268 tonnes = 268 000 kg

Ec = 1/2 x 268 000 x (574,8/3,6)²

Ec = 1/2 x 268 000 x 25493

Ec = 3 416 062 000 J

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