Bonjour,
situation A
d= 90*4 => 360m
Situation B:
480/ 120 => 4h
Situation C:
14 * 60*2= 14 * 120 =>1 680km
Situation D:
20m = 0,02km
12/0,02 = 600
600s = 600/60 => 10mn
1)
100m/ 9,58s
1m => 9,58/100= 0,0958m/s
2)
30km/h
30 000m/ 60mn
30 000/60 =>500m/mn
500/ 60 = 8,33m/s
