[tex]Dane:\\v_{o} = 0\\t = 30 \ s\\v = 36\frac{km}{h} =36\cdot\frac{1000 \ m}{3600 \ s} = 10\frac{m}{s}\\Szukane:\\a) \ a = ?\\b) \ s = ?[/tex]
Rozwiązanie:
a) Przyspiesznie:
[tex]a = \frac{\Delta v}{t}=\frac{v-v_{o}}{t} = \frac{v}{t}\\\\a = \frac{10\frac{m}{s}}{30 \ s}\\\\\boxed{a = \frac{1}{3}\frac{m}{s^{2}} \approx0,33\frac{m}{s^{2}}}[/tex]
b) Przebyta droga:
[tex]s = v_{sr}\cdot t\\\\v_{sr} = \frac{v_{o}+v}{2} = \frac{1}{2}v\\\\s = \frac{1}{2}v\cdot t\\\\s = \frac{1}{2}\cdot10\frac{m}{s}\cdot30 \ s\\\\\boxed{s = 150 \ m}[/tex]
