Sagot :
bonjour
30 m / min = 30 : 60 = 0.5 m /s
45 km / h = 45 000 : 3 600 = 12.5 m /s
21.6 km /h = 21 600 : 3 600 = 6 m /s
15 m /s = 0.015 x 3 600 = 54 km / h
3.2 m /s = 0 .0032 x 3 600 = 11.52 km / h
56 m /min = 0.056 x 60 = 3.36 km / h
Réponse:
1)
A/
30 m/min
1min = 60sec
30 ÷ 60 = 0,5m/s
B/
1h = 3600s
45km = 45000m
45000 ÷ 3600 = 12,5m/s
C/
1h = 3600s
21,6km = 21600m
21600 ÷ 3600 = 6m/s
2)
A/
15m = 0,015km
1h = 3600s
0,015 × 3600 = 54 km/h
B/
3,2m = 0,0032km
1h = 3600s
0,0032 × 3600 = 11,52 km/h
C/
56m = 0,056km
1h = 60min
0,056× 60 = 3,36 km/h