Răspuns :
a)
72km/h = 72000/3600= 20 m/s
v= d/∆t
10 min = 600 s
20m/s = d/ 600 s
d=20 m/s ×600 s
d=12000 m
b)
1 h =3600 s
15 min = 900 s
3600 s +900 s = 4500s
v =d/∆t
20 m/s =d/4500 s
d= 4500 s × 20 m /s
d= 90000 m
72km/h = 72000/3600= 20 m/s
v= d/∆t
10 min = 600 s
20m/s = d/ 600 s
d=20 m/s ×600 s
d=12000 m
b)
1 h =3600 s
15 min = 900 s
3600 s +900 s = 4500s
v =d/∆t
20 m/s =d/4500 s
d= 4500 s × 20 m /s
d= 90000 m
a) Δd1 = v·Δt1 = (20 m/s)·60 s = 1.200 m = 1,20 km
b) Δd2 = v·Δt2 = (20 m/s)·4.500 s = 90.000 m = 90 km
b) Δd2 = v·Δt2 = (20 m/s)·4.500 s = 90.000 m = 90 km