将甲乙两球从相同高度同时由静止开始落下,两球在到达地面前,除重力外,还受到空气阻力f的作用,此阻力与球的下落速率u成正比,即f=-ku(k>0),且两球的比例常数k完全相同,如图所示为两球的v-
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![将甲乙两球从相同高度同时由静止开始落下,两球在到达地面前,除重力外,还受到空气阻力f的作用,此阻力与球的下落速率u成正比,即f=-ku(k>0),且两球的比例常数k完全相同,如图所示为两球的v-](/uploads/image/z/8388025-25-5.jpg?t=%E5%B0%86%E7%94%B2%E4%B9%99%E4%B8%A4%E7%90%83%E4%BB%8E%E7%9B%B8%E5%90%8C%E9%AB%98%E5%BA%A6%E5%90%8C%E6%97%B6%E7%94%B1%E9%9D%99%E6%AD%A2%E5%BC%80%E5%A7%8B%E8%90%BD%E4%B8%8B%2C%E4%B8%A4%E7%90%83%E5%9C%A8%E5%88%B0%E8%BE%BE%E5%9C%B0%E9%9D%A2%E5%89%8D%2C%E9%99%A4%E9%87%8D%E5%8A%9B%E5%A4%96%2C%E8%BF%98%E5%8F%97%E5%88%B0%E7%A9%BA%E6%B0%94%E9%98%BB%E5%8A%9Bf%E7%9A%84%E4%BD%9C%E7%94%A8%2C%E6%AD%A4%E9%98%BB%E5%8A%9B%E4%B8%8E%E7%90%83%E7%9A%84%E4%B8%8B%E8%90%BD%E9%80%9F%E7%8E%87u%E6%88%90%E6%AD%A3%E6%AF%94%2C%E5%8D%B3f%3D-ku%28k%26gt%3B0%29%2C%E4%B8%94%E4%B8%A4%E7%90%83%E7%9A%84%E6%AF%94%E4%BE%8B%E5%B8%B8%E6%95%B0k%E5%AE%8C%E5%85%A8%E7%9B%B8%E5%90%8C%2C%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%E4%B8%BA%E4%B8%A4%E7%90%83%E7%9A%84v-)
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