Odpowiedź :
Odpowiedź:
s=50km
t=0,5h
v=s/t
v=50km/0,5h
v=100km/h=100*1000m/3600s≈27,78m/s
[tex]Dane:\\s = 50 \ km =50 \ 000 \ m\\t = 0,5 \ h = 0,5\cdot3600 \ s = 1 \ 800 \ s\\Szukane:\\v = ?\\\\v = \frac{s}{t}\\\\v = \frac{50000 \ m}{1800 \ s} = 27,(7)\frac{m}{s}\approx27,78\frac{m}{s}\\\\v = \frac{50 \ km}{0,5 \ h} = 100\frac{km}{h}\\\\\boxed{v\approx27,78\frac{m}{s} = 100\frac{km}{h}}[/tex]