如图所示底面积为80cm^2的圆柱缸,在水平面上,A圆柱底面积60cm^2,A在外的拉力为F1,将A放液体中浸没,液面上升7.5cm,此时拉力为F2,其到水面为h1,然后将其提起到h2,静止时的拉力为F3 已知F1与F2差为7.
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![如图所示底面积为80cm^2的圆柱缸,在水平面上,A圆柱底面积60cm^2,A在外的拉力为F1,将A放液体中浸没,液面上升7.5cm,此时拉力为F2,其到水面为h1,然后将其提起到h2,静止时的拉力为F3 已知F1与F2差为7.](/uploads/image/z/3721467-3-7.jpg?t=%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%E5%BA%95%E9%9D%A2%E7%A7%AF%E4%B8%BA80cm%5E2%E7%9A%84%E5%9C%86%E6%9F%B1%E7%BC%B8%2C%E5%9C%A8%E6%B0%B4%E5%B9%B3%E9%9D%A2%E4%B8%8A%2CA%E5%9C%86%E6%9F%B1%E5%BA%95%E9%9D%A2%E7%A7%AF60cm%5E2%2CA%E5%9C%A8%E5%A4%96%E7%9A%84%E6%8B%89%E5%8A%9B%E4%B8%BAF1%2C%E5%B0%86A%E6%94%BE%E6%B6%B2%E4%BD%93%E4%B8%AD%E6%B5%B8%E6%B2%A1%2C%E6%B6%B2%E9%9D%A2%E4%B8%8A%E5%8D%877.5cm%2C%E6%AD%A4%E6%97%B6%E6%8B%89%E5%8A%9B%E4%B8%BAF2%2C%E5%85%B6%E5%88%B0%E6%B0%B4%E9%9D%A2%E4%B8%BAh1%2C%E7%84%B6%E5%90%8E%E5%B0%86%E5%85%B6%E6%8F%90%E8%B5%B7%E5%88%B0h2%2C%E9%9D%99%E6%AD%A2%E6%97%B6%E7%9A%84%E6%8B%89%E5%8A%9B%E4%B8%BAF3+%E5%B7%B2%E7%9F%A5F1%E4%B8%8EF2%E5%B7%AE%E4%B8%BA7.)
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