Odpowiedź:
Zad. 2
v=s/t
s=2h*80km/h+3h*200km/h+1,5h*90km/h+0,5h*60km/h=925 km
t=2h+3h+1,5h+0,5h=7h
vśr=925km/7h=132,142857 km/h
Zad. 3
v=120km/h=33,33 m/s
