[tex]Dane:\\v_{o} = 0\\t = 0,5 \ min = 0,5\cdot60 \ s = 30 \ s\\v = 80\frac{m}{s}\\Szukane:\\s = ?\\a = ?[/tex]
Rozwiązanie
Droga s:
[tex]s = v_{sr}\cdot t\\\\v_{sr} = \frac{v_{o}+v}{2} = \frac{1}{2}v\\\\s = \frac{1}{2}vt\\\\s = \frac{1}{2}\cdot80\frac{m}{s}\cdot30 \ s\\\\\boxed{s = 1 \ 200 \ m = 1,2 \ km}[/tex]
Przyspieszenie a:
[tex]a = \frac{\Delta v}{t} = \frac{v-v_{o}}{t} = \frac{v}{t}\\\\a = \frac{80\frac{m}{s}}{30 \ s}\\\\\boxed{a = 2,(6)\frac{m}{s^{2}}\approx2,7\frac{m}{s^{2}}}[/tex]
