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範例:靜止液體的壓力與浮力[93指考]

某人手握一個空玻璃杯,將杯口朝下,垂直按入水面下,如圖所示。已知杯內水面與容器水面間的高度差為10.0 cm,玻璃杯的截面積為30.0 cm2、重量為180 gw (克重)。若不計杯內的空氣重量,則此人在垂直方向需施力若干,才能維持玻璃杯的平衡?(A)120 gw (B)180 gw (C)260 gw (D)300 gw (E)480 gw [93指定考]


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Posted in 歷屆物理考題, 液體的浮力, 靜止的液體.

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