1km/h=   m/s 3,5km/h=   m/s 1m/s=     km/h   15m/s=    km/h

1 km = 1000 m 1 m = 0,001 km 1 h = 3600 s 1 s = 1/3600 h 1 km/h = 1 * 1000m/3600s = 0,28 m/s 3,5 km/h = 3,5 * 1000m/3600s = 0,97 m/s 1 m/s = 1 * 0,001km/(1/3600)h = 3,6 km/h 15 m/s = 15 * 0,001km/(1/3600)h = 54 km/h