如图所示,让小球从位置A由静止开始下摆,正好摆到最低点B时摆线被拉断,设摆线长l=1.6m,悬点到地面的高度为h=6.6m,不计空气阻力,求摆球落地时的速度.
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![如图所示,让小球从位置A由静止开始下摆,正好摆到最低点B时摆线被拉断,设摆线长l=1.6m,悬点到地面的高度为h=6.6m,不计空气阻力,求摆球落地时的速度.](/uploads/image/z/6552703-55-3.jpg?t=%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%2C%E8%AE%A9%E5%B0%8F%E7%90%83%E4%BB%8E%E4%BD%8D%E7%BD%AEA%E7%94%B1%E9%9D%99%E6%AD%A2%E5%BC%80%E5%A7%8B%E4%B8%8B%E6%91%86%2C%E6%AD%A3%E5%A5%BD%E6%91%86%E5%88%B0%E6%9C%80%E4%BD%8E%E7%82%B9B%E6%97%B6%E6%91%86%E7%BA%BF%E8%A2%AB%E6%8B%89%E6%96%AD%2C%E8%AE%BE%E6%91%86%E7%BA%BF%E9%95%BFl%3D1.6m%2C%E6%82%AC%E7%82%B9%E5%88%B0%E5%9C%B0%E9%9D%A2%E7%9A%84%E9%AB%98%E5%BA%A6%E4%B8%BAh%3D6.6m%2C%E4%B8%8D%E8%AE%A1%E7%A9%BA%E6%B0%94%E9%98%BB%E5%8A%9B%2C%E6%B1%82%E6%91%86%E7%90%83%E8%90%BD%E5%9C%B0%E6%97%B6%E7%9A%84%E9%80%9F%E5%BA%A6.)
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