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浮力 1.浮力及產生原因:浸在液體(或氣體)中的物體受到液體(或氣體)對它向上托的力叫浮力.方向:豎直向上;原因:液體對物體的上、下壓力差. 2.阿基米德原理:浸在液體裏的物體受到向上的浮力,浮力大小等於物體排開液體所受重力. 即F浮=G液排=ρ液gV排. (V排表示物體排開液體的體積) 3.浮力計算公式:F浮=G-T=ρ液gV排=F上、下壓力差 4.當物體漂浮時:F浮=G物且ρ物G物且ρ物
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