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s=1km=1000m t=?
a=10m\s2
t=2s\a (to jest pod pierwiastkiem)
t=2*1000m\ 10m\s2
t=2000m\10m\s2
t=200s
t=14,14(w przyblizeniu)
Odp.Cialo pokona 1 km w wczasie 14,14sek.
s=at²/2
t²=2s/a
t=√(2s/a)
t=√(2*1000m/10m/s²)
t=√200s²
t≈14,14 s