Odpowiedzi

2009-11-19T21:48:06+01:00
V = s/t
więc
t = s/V
t = 69m / 5,56m/s = 12,41 s
2009-11-19T21:48:41+01:00
20km/h=20*1000m /3600s=5,5(5)m/s

V=S/t
t=S/V


t=69m / 5,55m/s=12,43s
2009-11-19T21:53:34+01:00
20*0,277777777=5,5
v=s/t
s/v=t
69/5,5=12,54s