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Soit un mouvement dfinie par son quation horalre : (10pts) a(t)=2t' +4t +5 Trouver la vitesse et l' acclration de ce mobile aprs 2s du

Soit un mouvement dfinie par son quation horalre : (10pts) a(t)=2t' +4t +5 Trouver la vitesse et l' acclration de ce mobile aprs 2s du parcours sachant que le rayon moyenne de la trajectoire est 30cm.

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