FPT 2021 IPT connect | FPT 2022 Physics Fights Classement Problèmes Participants Jurés

11. Smashing spheres

Smashing two steel spheres together with a paper in between at the point of collision, produces enough heat that it burns off the paper. Conducting the same experiment with aluminium foil, you will observe concentric rings on the foil after collision. Study this phenomenon. Can it be observed for other materials? https://youtu.be/I4cVADCfHQY

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ESPCI

7,00

Université Paris-Saclay

6,38

Université de Lyon - UCBL - ENS de Lyon

8,25

École polytechnique

7,88

Moyenne

7,63

7,13