[tex]dane:\\v_{o} = 0\\t = 4 \ s\\v = 90\frac{km}{h} = 90\cdot\frac{1000 \ m}{3600 \ s} = 25\frac{m}{s}\\szukane:\\a = ?\\s = ?[/tex]
Rozwiązanie
Przyspieszenie a:
[tex]a = \frac{\Delta v}{t} = \frac{v-v_{o}}{t} = \frac{v}{t}\\\\a = \frac{25\frac{m}{s}}{4 \ s}\\\\\underline{a = 6,25\frac{m}{s^{2}}}[/tex]
Droga s:
[tex]s = \frac{1}{2}at^{2}\\\\s = \frac{1}{2}\cdot6,25\frac{m}{s^{2}}\cdot(4 \ s)^{2}\\\\\underline{s = 50 \ m}[/tex]
