[tex]dane:\\v_{o} = 20\frac{m}{s}\\t = 4 \ s\\v = 40\frac{m}{s}\\szukane:\\a = ?\\s = ?[/tex]
Rozwiązanie
Przyspieszenie:
[tex]a = \frac{\Delta v}{t} = \frac{v-v_{o}}{t}\\\\a = \frac{40\frac{m}{s}-20\frac{m}{s}}{4 \ s}\\\\a = \frac{20\frac{m}{s}}{4 \ s}\\\\\boxed{a = 5\frac{m}{s^{2}}}[/tex]
Droga:
[tex]s = \frac{1}{2}at^{2}}\\\\s = \frac{1}{2}\cdot5\frac{m}{s^{2}}\cdot(4 \ s)^{2}\\\\s = \frac{1}{2}\cdot5\cdot16 \ m\\\\\boxed{s = 40 \ m}[/tex]
