Réponse :
1) d = 160 x 30/60 = 160/2 = 80 km
2) vmoy = 18/20/60 = 18/1/3 = 18 x 3 = 54 km/h
3) vmoy = 30/15/60 = 30 x 4 = 120 km/h
4) vmoy = 500/2.5 = 200 km/h
5) 2 m/s = 2 x 0.001/1/3600 = 0.002 x 3600 = 0.2 x 36 = 7.2 km/h
6) convertir 360 m/min en m/s
360/60 = 6 m/s
7) d = 120 x 20/60 = 120/3 = 40 km
8) d = 110 x 3 = 330 km
9) vmoy = 100/10 = 10 m/s
10) d = 36 x 15/60 = 36/4 = 9 km
Explications détape par étape :
