什么情况重力势能全部转化成动能,也就是重力势能与动能相等mgh=1/2mv^2
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![什么情况重力势能全部转化成动能,也就是重力势能与动能相等mgh=1/2mv^2](/uploads/image/z/4944763-19-3.jpg?t=%E4%BB%80%E4%B9%88%E6%83%85%E5%86%B5%E9%87%8D%E5%8A%9B%E5%8A%BF%E8%83%BD%E5%85%A8%E9%83%A8%E8%BD%AC%E5%8C%96%E6%88%90%E5%8A%A8%E8%83%BD%2C%E4%B9%9F%E5%B0%B1%E6%98%AF%E9%87%8D%E5%8A%9B%E5%8A%BF%E8%83%BD%E4%B8%8E%E5%8A%A8%E8%83%BD%E7%9B%B8%E7%AD%89mgh%3D1%2F2mv%5E2)
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