应用动能定理解答,要有原因过程质量为m的小球用长度为L的轻绳系住,在竖直平面内做圆周运动,运动过程中小球受空气阻力作用.已知小球经过最低点时轻绳受到的拉力为7mg,经过半周小球恰好
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![应用动能定理解答,要有原因过程质量为m的小球用长度为L的轻绳系住,在竖直平面内做圆周运动,运动过程中小球受空气阻力作用.已知小球经过最低点时轻绳受到的拉力为7mg,经过半周小球恰好](/uploads/image/z/13046902-70-2.jpg?t=%E5%BA%94%E7%94%A8%E5%8A%A8%E8%83%BD%E5%AE%9A%E7%90%86%E8%A7%A3%E7%AD%94%2C%E8%A6%81%E6%9C%89%E5%8E%9F%E5%9B%A0%E8%BF%87%E7%A8%8B%E8%B4%A8%E9%87%8F%E4%B8%BAm%E7%9A%84%E5%B0%8F%E7%90%83%E7%94%A8%E9%95%BF%E5%BA%A6%E4%B8%BAL%E7%9A%84%E8%BD%BB%E7%BB%B3%E7%B3%BB%E4%BD%8F%2C%E5%9C%A8%E7%AB%96%E7%9B%B4%E5%B9%B3%E9%9D%A2%E5%86%85%E5%81%9A%E5%9C%86%E5%91%A8%E8%BF%90%E5%8A%A8%2C%E8%BF%90%E5%8A%A8%E8%BF%87%E7%A8%8B%E4%B8%AD%E5%B0%8F%E7%90%83%E5%8F%97%E7%A9%BA%E6%B0%94%E9%98%BB%E5%8A%9B%E4%BD%9C%E7%94%A8.%E5%B7%B2%E7%9F%A5%E5%B0%8F%E7%90%83%E7%BB%8F%E8%BF%87%E6%9C%80%E4%BD%8E%E7%82%B9%E6%97%B6%E8%BD%BB%E7%BB%B3%E5%8F%97%E5%88%B0%E7%9A%84%E6%8B%89%E5%8A%9B%E4%B8%BA7mg%2C%E7%BB%8F%E8%BF%87%E5%8D%8A%E5%91%A8%E5%B0%8F%E7%90%83%E6%81%B0%E5%A5%BD)
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