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s = vt
s = 60km/h * 1/120 h = 1/2 km = 0,5 km = 500m
Pociąg ma długość 500m
s=V*t
v= 60 km/h
v= 60 km/h= x m/s
v= 60 *1000m/3600 s bo km to 1000 m a godzina to 3600 s
v=100/6
v= 16i 2/3m/s
t=30 s
s= 16 2/3 m/s * 30 s
s=400 m
Odp. Pociag miał długosć 400m.