升降机内的弹簧下端吊一物体A,其质量为m 体积为V 全部浸没水中,当升降机由静止开始以加速度a(a升降机a向下应该处于失重状态。那物体重心应向下运动..依题意物体密度应该大于水。所以
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![升降机内的弹簧下端吊一物体A,其质量为m 体积为V 全部浸没水中,当升降机由静止开始以加速度a(a升降机a向下应该处于失重状态。那物体重心应向下运动..依题意物体密度应该大于水。所以](/uploads/image/z/913373-53-3.jpg?t=%E5%8D%87%E9%99%8D%E6%9C%BA%E5%86%85%E7%9A%84%E5%BC%B9%E7%B0%A7%E4%B8%8B%E7%AB%AF%E5%90%8A%E4%B8%80%E7%89%A9%E4%BD%93A%2C%E5%85%B6%E8%B4%A8%E9%87%8F%E4%B8%BAm+%E4%BD%93%E7%A7%AF%E4%B8%BAV+%E5%85%A8%E9%83%A8%E6%B5%B8%E6%B2%A1%E6%B0%B4%E4%B8%AD%2C%E5%BD%93%E5%8D%87%E9%99%8D%E6%9C%BA%E7%94%B1%E9%9D%99%E6%AD%A2%E5%BC%80%E5%A7%8B%E4%BB%A5%E5%8A%A0%E9%80%9F%E5%BA%A6a%EF%BC%88a%E5%8D%87%E9%99%8D%E6%9C%BAa%E5%90%91%E4%B8%8B%E5%BA%94%E8%AF%A5%E5%A4%84%E4%BA%8E%E5%A4%B1%E9%87%8D%E7%8A%B6%E6%80%81%E3%80%82%E9%82%A3%E7%89%A9%E4%BD%93%E9%87%8D%E5%BF%83%E5%BA%94%E5%90%91%E4%B8%8B%E8%BF%90%E5%8A%A8..%E4%BE%9D%E9%A2%98%E6%84%8F%E7%89%A9%E4%BD%93%E5%AF%86%E5%BA%A6%E5%BA%94%E8%AF%A5%E5%A4%A7%E4%BA%8E%E6%B0%B4%E3%80%82%E6%89%80%E4%BB%A5)
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