Odpowiedzi

2009-11-18T23:09:23+01:00
V1 = 54 km/h =54 000 m/h = 54 000 /3600 m/s =15 m/s
v2 = 10 m/s
v² =15² + 10² = 225 + 100 = 325
v = √325 ≈ 18,03
Odp.
v = 18,03 m/s
v = 18,03 * 3 600 m/h =64 908 m/h = 64,908 km/h