Odpowiedzi

2009-11-10T17:34:18+01:00
V=s/t
t=s/V
s=0.2km
t=0.2/54=0.0037h=0.22min=13,3(s)
4 1 4
2009-11-10T17:36:44+01:00
S=200m
Vk=0
V=54km/s=15 m/s
s=Vot-1/2at(kwadrat)
0=vo-at
at=Vo

s=Vot-1/2Vot
s=1/2Vot
2s/Vo=t
2*200/15= t
t=26,6 s
4 5 4
2009-11-10T20:51:27+01:00
Mysle ze to : V=s/t
t=s/V
s=0.2km
t=0.2/54=0.0037h=0.22min=13,3(s)

ale nie jestem pewna w 100% :)
pozdrawiam
4 1 4