ESPCI web site
Boyun CHEN et Chengcheng ZHOU
Problème du Tournoi International de Physique 2023 (Site tournoi français :)
The chalk trick
It is possible to draw continuous lines in a blackboard with chalk. However, by changing the angle of contact, the line drawn on the board becomes a dotted line, though the movement is still continuous. What parameters from the relative movement between the chalk and the board can be inferred from the resulting trace ? Is it possible to infer anything about the dimensions of the chalk ? lien :
Informations complémentaires (codes pythons, matlab etc) => fichiers téléchargeables
Une question ? Vous pouvez nous contacter par mail sur le modèle 
