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Calude1978
@Calude1978
May 2023
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un athlète court le 400m en 45s.
1. calculer la vitesse moyenne de cet athlète lors de cette course. (en m/s)
2. convertir cette vitesse en km/h
3. calculer l'énergie cinétique (en J) de cet athlète sachant que sa masse est de 75kg
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moomensaidi
1-8.8m/s
2-28km/h
3-Ec=1/2 * masse * (vitesse*vitesse)
=1/2 * 75 * (8,8*8,8)
=2904J
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Calude1978
April 2023 | 0 Respostas
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2-28km/h
3-Ec=1/2 * masse * (vitesse*vitesse)
=1/2 * 75 * (8,8*8,8)
=2904J