Physics
Physics, 25.09.2021 14:00, angie0928ag

Une roue comportant un rayon tourne avec une fréquence f . cette roue est éclairées à l'aide d'un stroboscope . La fréquence fe des éclairs est réglable 1- Pour quelles fréquences des éclaires observe-t-on une roue immobile avec un seul rayon ?
2- La plus grande fréquence des éclairs pour laquelle on observe une roue immobile avec un rayon est fe= 40 HZ . Déterminer la fréquence de la roue et sa votesse de rotationen trs/min .
3- Indiquer ce qu'on observe dans les deux cas suivants : fe=120 HZ ; fe=10HZ

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Une roue comportant un rayon tourne avec une fréquence f . cette roue est éclairées à l'aide d'un st...

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