Odpowiedź :
Z zasady zachowania energii
0,5mv² = mgh => h = v²/2g
h = (3m/s)²/2*10m/s² = 0,45m
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[tex]Dane:\\ V=3\frac{m}{s}\\ g=10\frac{m}{s^2}\\ Oblicz:\\ h=?\\ Rozwiazanie:\\ Ek=Ep\\\\ \frac{1}{2}mV^2=mgh\\\\ mV^2=2mgh\\\\ V^2=2gh\\\\ h=\frac{V^2}{2g}\\\\ h=\frac{3^2}{2*10}\\\\ h=\frac{9}{20}\\\\ h=0,45m[/tex]