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h - 10m
Ep = Ek
Ep = m x g x h
Ek = m x v2 / 2
m x g x h = (m x v)/2 / x2
g x h = v2 /x 2
2 x g * h = v2
v ≈ 14, 1 m/s
Odp. Ta prędkość wynosi ok. 14,1 m/s