zamien jednostki: 1)60m/min= m/s 2)300cm/s= m/s 3)20m/s= km/h 4)36km/h= m/s

1 min = 60 s 60 m/min = 60 m / 60 s = 1 m/s 300 cm = 3 m 300 cm/s = 3 m/s 20 m = 0,02 km 1 s = 1/3600 h 0.02 km : 1/3600 h = 72 km/h 36 km = 36000 m 1 h = 3600 s 36000 m / 3600 s = 10 m/s