Mcguire Paul
05/23/2023 · Senior High School
Une roue de vélo tourne à raison de 8 tours par seconde. On considère la valve comme un point mobile \( M \) décrivant un cercle de rayon 30 cm . \( \begin{array}{ll}\text { 1) } & \text { Calculer la vitesse angulaire du point } M . \\ \text { 2) } & \text { En déduire sa vitesse linéaire et son accélération. }\end{array} \)
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1. Vitesse angulaire \( \omega \) : \( 16\pi \, \text{rad/s} \)
2. Vitesse linéaire \( v \) : \( 4,8\pi \, \text{m/s} \approx 15,08 \, \text{m/s} \)
3. Accélération centripète \( a_c \) : \( 76,8\pi^2 \, \text{m/s}^2 \approx 241,5 \, \text{m/s}^2 \)
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