Sagot :
80km/h en m/s c'est :
1km = 1x1000m
donc 80km = 80x1000 = 80000m
1h = 60min = 60x60s = 3600s
donc 80km/h = 80000/3600m/s = 800/36m/s = 200/9 m/s = 22,2222222222..m/s
Une voiture roule a 80km/h donner sa vitesse en m/s
80km/h en m/s c'est :
1km = 1x1000m
donc 80km = 80x1000 = 80000m
1h = 60min = 60x60s = 3600s
donc 80km/h = 80000/3600m/s = 800/36m/s = 200/9 m/s = 22,2222222222..m/s