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h = 1m
g = 10m/s²
Szukane:
v
Energia potencjalna = energii kinetycznej:
mgh = mv²/2
gh = v²/2
v² = 2gh
v = √(2gh) = √(2 * 10 * 1) = 2√5 [√(m/s²*m) = m/s]
v ≈ 4,47 m/s