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t=100s
Vo=?
Vk=0,5Vo
a=ΔV/t
ΔV=0,5Vo
a=0,5Vo/t
S=Vot-at²/2
za a podstawiamy 0,5Vo/t
S=Vot-0,5Vot/2
Wyciągamy Vo
Vo=S/(t-0,25t)
Vo=1500/75=20m/s