Odpowiedź :
[tex]Dane:\\s = 42 \ m\\v = 8\frac{m}{s}\\Szukane:\\t = ?\\\\\\v = \frac{s}{t} \ \ \rightarrow \ \ t = \frac{s}{v}\\\\t = \frac{42 \ m}{8\frac{m}{s}}\\\\\boxed{t = 5,25 \ s}[/tex]
[tex]Dane:\\s = 42 \ m\\v = 8\frac{m}{s}\\Szukane:\\t = ?\\\\\\v = \frac{s}{t} \ \ \rightarrow \ \ t = \frac{s}{v}\\\\t = \frac{42 \ m}{8\frac{m}{s}}\\\\\boxed{t = 5,25 \ s}[/tex]