[tex]Dane:\\v_{o} = 0\\t = 12 \ s\\s = 216 \ m\\Szukane:\\v = ?\\\\Rozwiazanie\\\\s = \frac{1}{2}at^{2}\\\\ale \ \ a = \frac{v}{t}\\\\s = \frac{1}{2}\cdot\frac{v}{t}\cdot t^{2}\\\\s = \frac{1}{2}v\cdot t \ \ /\cdot\frac{2}{t}\\\\v = \frac{2s}{t}\\\\{v = \frac{2\cdot216 \ m}{12 \ s}}\\\\\boxed{v = 36\frac{m}{s}}[/tex]
