1、两立方体金属块密度之比为1:2,体积之比为1:4,将它们放在地面上,则所具重力势能大小之比是______ .2、用竖直向上的拉力将质量M=40KG的物体以V0=3M/S速度匀速提升H=7.5M,物体克服重力做功为
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![1、两立方体金属块密度之比为1:2,体积之比为1:4,将它们放在地面上,则所具重力势能大小之比是______ .2、用竖直向上的拉力将质量M=40KG的物体以V0=3M/S速度匀速提升H=7.5M,物体克服重力做功为](/uploads/image/z/12003870-30-0.jpg?t=1%E3%80%81%E4%B8%A4%E7%AB%8B%E6%96%B9%E4%BD%93%E9%87%91%E5%B1%9E%E5%9D%97%E5%AF%86%E5%BA%A6%E4%B9%8B%E6%AF%94%E4%B8%BA1%EF%BC%9A2%2C%E4%BD%93%E7%A7%AF%E4%B9%8B%E6%AF%94%E4%B8%BA1%EF%BC%9A4%2C%E5%B0%86%E5%AE%83%E4%BB%AC%E6%94%BE%E5%9C%A8%E5%9C%B0%E9%9D%A2%E4%B8%8A%2C%E5%88%99%E6%89%80%E5%85%B7%E9%87%8D%E5%8A%9B%E5%8A%BF%E8%83%BD%E5%A4%A7%E5%B0%8F%E4%B9%8B%E6%AF%94%E6%98%AF______+.2%E3%80%81%E7%94%A8%E7%AB%96%E7%9B%B4%E5%90%91%E4%B8%8A%E7%9A%84%E6%8B%89%E5%8A%9B%E5%B0%86%E8%B4%A8%E9%87%8FM%3D40KG%E7%9A%84%E7%89%A9%E4%BD%93%E4%BB%A5V0%3D3M%2FS%E9%80%9F%E5%BA%A6%E5%8C%80%E9%80%9F%E6%8F%90%E5%8D%87H%3D7.5M%2C%E7%89%A9%E4%BD%93%E5%85%8B%E6%9C%8D%E9%87%8D%E5%8A%9B%E5%81%9A%E5%8A%9F%E4%B8%BA)
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