pentru a calcula distanta parcursa in 10 s transformam 72km/h in m/s:
72km/h=72*1000m/3600s=20m/s
v=d/t; d=v*t;d=20m/s*10s=200m
pentru a parcurge 25km e nevoie de t=d/v; t=25km/72km/h=0,347h
sau transformam in SI t=25000m/20m/s=1250s
1250s=1250/3600=0.347h