Odpowiedź:
1. 10 km
2. 45 km
3. 192 km
4. 48 km
5. 22,5 km
6. 32 km/h
7. 84 km/h
8. 12 cm/min
9. 38 km/h
10. 19,2 km/h
11. 4 h
12. 5 min
13. 29 sekund
14. 18 min
15. 14 min
16. 20 min
17. 108 km/h
18. 40 m/s
Szczegółowe wyjaśnienie:
1
v = 20 km/h
t = 0,5 h = 30/60 h = 1/2
S = ?
S = v * t
S = 20 km/h * 1/2 h = 10 km
2
v = 60 km/h
t = 45 min = 45/60 h
S = ?
S = v * t
S = 60 km/h * 45/60 h = 45 km
3
v = 320 km/h
t = 36 min = 36/60 h
S = ?
S = v * t
S = 320 km/h * 36/60 h = 192 km
4
v = 480 km/h
t = 6 min = 6/60 h = 1/10 h
S = ?
S = v * t
S = 480 km/h * 1/10 h = 48 km
5
v = 5 km/h
t = 4,5 h
S = ?
S = v * t
S = 5 km/h * 4,5 h = 22,5 km
6
t = 30 min = 30/60 h = 1/2 h
s = 16 km
v = ?
v = s/t
v = 16 km : 1/2 h = 32 km/h
7
t = 10 min = 10/60 h
s = 14 km
v = ?
v = s:t
v = 14 km : 10/60 h = 14 * 60/10 = 14 * 6 = 84 km/h
8
t = 5 sek = 5/60 min = 1/12 min
s = 1 cm
v = ?
v = s/t
v = 1 km : 1/12 min = 12 cm/min
9
t = 3 min = 3/60 h = 1/20 h
s = 1,9 km
v = ?
v = s/t
v = 1,9 km : 1/20 h = 38 km/h
10
t = 15 sek = 15/3600 h = 1/240 h
s = 80 m = 0,08 km
v = ?
v = s/t
v = 8/100 km : 1/240 h = 19,2 km/h
11
v = 15 km/h
S = 60 km
t = ?
t = s : v
t = 60 km : 15 km/h = 4 h
12
v = 5 m/min
S = 25 m
t = ?
t = s : v
t = 25 m : 5 m/min = 5 min
13
v = 3 cm/s
S = 87 cm
t = ?
t = s : v
t = 87 cm : 3 cm/s = 29 s
14
v = 20 km/h = 20 * 1 km : 60 min (przeliczenie km/h na km/min) = 1/3 km/min
S = 6 km
t = ?
t = s : v
t = 6 km : 1/3 km/min = 18 min
15
v = 250 m/s = 250 * 1/1000 km : 1/60 min = 15 km/min
S = 210 km
t = ?
t = 210 km : 15 km/min = 14 min
16
v = 120 km/h = 120 * 1km : 60 min = 2 km/min
S = 40 km
t = ?
t = 40 km : 2 km/min = 20 min
17
30 m/s = 30 * 1/1000 km : 1/3600 h = 108 km/h
18
144 km/h = 144 * 1000 m : 3600 s = 40 m/s
