[tex]Dane:\\v_{o} = 36\frac{km}{h}\\t = 30 \ s\\v = 72\frac{km}{h}\\Szukane:\\a = ?\\\\a= \frac{\Delta v}{t}\\\\\Delta v = 72\frac{km}{h}-36\frac{km}{h} = 36\frac{km}{h} = 36\cdot\frac{1000 \ m}{3600 \ s} = 10\frac{m}{s}\\\\a = \frac{10\frac{m}{s}}{30 \ s}\\\\\boxed{a = 0,(3)\frac{m}{s^{2}}\approx 0,33\frac{m}{s^{2}}}[/tex]
