[tex]Dane:\\v_{o} = 0\\t = 10 \ s\\v = 54\frac{km}{h} = 54\cdot\frac{1000 \ m}{3600 \ s} = 15\frac{m}{s}\\Szukane:\\s = ?\\\\s = \frac{1}{2}at^{2}\\\\a = \frac{\Delta v}{t} = \frac{v-v_{o}}{t} = \frac{v}{t} = \frac{15\frac{m}{s}}{10 \ s} = 1,5\frac{m}{s^{2}}\\\\s = \frac{1}{2}\cdot1,5\frac{m}{s^{2}}\cdot(10 \ s)^{2}\\\\\boxed{s = 75 \ m}[/tex]