[tex]Dane:\\v_{o} =0\\a = 1,4\frac{m}{s^{2}}\\v = 45\frac{km}{h} = 45\cdot\frac{1000 \ m}{3600 \ s} = 12,5\frac{m}{s}\\Szukane:\\s = ?\\\\Rozwiazanie\\\\s = \frac{1}{2}at^{2}\\\\ale\\\\v = a\cdot t \ \ \rightarrow \ \ t = \frac{v}{a}\\\\s = \frac{1}{2}a\cdot(\frac{v}{a})^{2}\\\\s = \frac{1}{2}a\cdot\frac{v^{2}}{a^{2}}\\\\s = \frac{v^{2}}{2a}\\\\s = \frac{(12,5\frac{m}{s})^{2}}{2\cdot1,4\frac{m}{s^{2}}} = \frac{156,25\frac{m^{2}}{s^{2}}}{2,8\frac{m}{s^{2}}}\\\\\boxed{s \approx55,8 \ m}[/tex]
