pic solucio rebot
https://visions.upc.edu/ca/steam-a-classe/e8-la-fisica-del-rebot/pick-solucio-rebot.png/view
https://visions.upc.edu/ca/steam-a-classe/e8-la-fisica-del-rebot/pick-solucio-rebot.png/@@download/image/pick solucio rebot.PNG
pic solucio rebot
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559x804
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