水面上有一个长为L,密度为p,截面均匀的均质木棒,现用手持棒,使棒下端与睡水面接触,放手后,木棒竖直下沉,不计阻力,试求当p=2/3p水时,棒下沉到最后位置所需时间
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![水面上有一个长为L,密度为p,截面均匀的均质木棒,现用手持棒,使棒下端与睡水面接触,放手后,木棒竖直下沉,不计阻力,试求当p=2/3p水时,棒下沉到最后位置所需时间](/uploads/image/z/11407692-12-2.jpg?t=%E6%B0%B4%E9%9D%A2%E4%B8%8A%E6%9C%89%E4%B8%80%E4%B8%AA%E9%95%BF%E4%B8%BAL%2C%E5%AF%86%E5%BA%A6%E4%B8%BAp%2C%E6%88%AA%E9%9D%A2%E5%9D%87%E5%8C%80%E7%9A%84%E5%9D%87%E8%B4%A8%E6%9C%A8%E6%A3%92%2C%E7%8E%B0%E7%94%A8%E6%89%8B%E6%8C%81%E6%A3%92%2C%E4%BD%BF%E6%A3%92%E4%B8%8B%E7%AB%AF%E4%B8%8E%E7%9D%A1%E6%B0%B4%E9%9D%A2%E6%8E%A5%E8%A7%A6%2C%E6%94%BE%E6%89%8B%E5%90%8E%2C%E6%9C%A8%E6%A3%92%E7%AB%96%E7%9B%B4%E4%B8%8B%E6%B2%89%2C%E4%B8%8D%E8%AE%A1%E9%98%BB%E5%8A%9B%2C%E8%AF%95%E6%B1%82%E5%BD%93p%3D2%2F3p%E6%B0%B4%E6%97%B6%2C%E6%A3%92%E4%B8%8B%E6%B2%89%E5%88%B0%E6%9C%80%E5%90%8E%E4%BD%8D%E7%BD%AE%E6%89%80%E9%9C%80%E6%97%B6%E9%97%B4)
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