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範例:浮力(沈體)與滑輪

如右圖,不計繩重,滑輪重及摩擦,物體浸入水中,拉力F200克重系統平衡,若將水槽移走,使物體懸於空氣中,拉力F增為250克重。才可使滑輪不動,則該物體密度為多少克/厘米3[87北聯]


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