Odpowiedź :
v = s/t | s = vt | t = s/v
zadanie 1.
3h 30min = 3,5h
v = 40/3,5 ≈ 11,4km/h
zadanie 2.
t = 12/18 = 2/3 h = 40min
zadanie 3.
s = 5 × 7,5 = 37,5km
Odpowiedź:
1. 3,17 m/s 2. 2400s=40 min 3.37 530 m= 37,5 km
Wyjaśnienie:
1. s= 40 km= 40 000 m
t= 3h 30 min = 12 600s
v=s/t= 40 000 m/12 600 s= 3,17 m/s
2. s= 12 km= 12 000 m
v= 18 km/h = 5 m/s
t= s/v = 12 000m/5 m/s= 2 400s= 40 min
3. v= 5km/h= 1,39 m/s
t= 7,5h= 450 min= 27 000s
s=v*t=1,39*27 000s= 37 530 m= 37,5 km