O bila avand masa m=2kg cade liber de la inaltimea h=20m fata de sol. Cand bila trece printr-un punct P energia potentiala a sistemului bila-Pamant este o treime din energia sa cinetica.(g=10N/kg)
a) La ce inaltime fata de sol se gaseste punctul P?
b) Care este energia cinetica a bilei cand trece prin punctul P?
c) Care este viteza cu care corpul atinge solul?
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O bila avand masa m=2kg cade liber de la inaltimea h=20m fata de sol. Cand bila trece printr-un punc...
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