Закон сохранения энергии:
mgh = (mv^2)÷2
=> h = (mv^2)÷(2mg)
=> h = (v^2)÷2g
=> h = 45 м
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Закон сохранения энергии:
mgh = (mv^2)÷2
=> h = (mv^2)÷(2mg)
=> h = (v^2)÷2g
=> h = 45 м