[tex]Dane:\\v_1 = 8\frac{m}{s}\\t = 2 \ s\\v_2 = 20\frac{m}{s}\\Szukane:\\a = ?\\\\Rozwiazanie\\\\a = \frac{\Delta v}{t} = \frac{v_2-v_1}{t}\\\\a = \frac{20\frac{m}{s}-8\frac{m}{s}}{2 \ s} =\frac{12\frac{m}{s}}{2 \ s}\\\\\boxed{a = 6\frac{m}{s^{2}}}[/tex]
