Physics

14 June, 14:08

1. Na jaką wysokość wzniesie się piłka kopnięta pionowo w górę z prędkością 20 m/s? 2. Piłka o masie 20 dag spada z wysokości 15 metrów. Oblicz jej prędkość w momencie uderzenia o ziemię. Ile wynosi jej energia kinetyczna na powierzchni ziemi.

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