v = 70 km/h = 70 * 1000 m/3600 s
= 70.000m/3600 s = 19,44 m/s (sau 175/9)
(viteza trebuie transformata in sistemul international)
v = d/t
t = d/v
t = 1000/(175/9)
t = 1000 * 9/175
t = 9000/175
t = 360/7
t = 51,42 s
