h=gt²/2 = 10×10²/2 = 500м
А=Fh=mgh = 0.05кг×10н/кг×500м = 250Дж
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h=gt²/2 = 10×10²/2 = 500м
А=Fh=mgh = 0.05кг×10н/кг×500м = 250Дж