6.
[tex]dane:\\v = 120\frac{km}{h} = \frac{120 \ km}{60 \ min} = 2\frac{km}{mn}\\s = 5 \ km\\szukane:\\t = ?\\\\t = \frac{s}{v}\\\\t = \frac{5 \ km}{2\frac{km}{min}} = 2,5 \ min[/tex]
7.
[tex]dane:\\v = 60\frac{km}{h} = \frac{60 \ km}{60 \ min} = 1\frac{km}{min}\\t = 20 \ min\\szukane:\\s = ?\\\\s = v\cdot t\\\\s = 1\frac{km}{min}\cdot 20 \ min = 20 \ km[/tex]
8.
[tex]dane:\\t = 5 \ min = 5\cdot60 \ s = 300 \ s\\s = 2 \ m\\szukane:\\v = ?\\\\v = \frac{s}{t}\\\\v = \frac{20 \ m}{300 \ s} = 0,00(6)\frac{m}{s}\approx0,007\frac{m}{s}[/tex]
