[tex]dane:\\v_{o} = 0\\a = 0,85\frac{m}{s^{2}}\\v = 25,5\frac{m}{s}\\szukane:\\t = ?\\\\Rozwiazanie\\\\v = a\cdot t \ \ /:a\\\\t = \frac{v}{a}\\\\t = \frac{25,5\frac{m}{s}}{0,85\frac{m}{s^{2}}}\\\\t = 30 \ s[/tex]
