过山车是游乐场中常见的设施.下图是一种过山车的简易模型,它由水平轨道和在竖直平面内的三个圆形轨道组成,B、C、D分别是三个圆形轨道的最低点,B、C间距与C、D间距相等,半径R1=2m、R2=1.4m.
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![过山车是游乐场中常见的设施.下图是一种过山车的简易模型,它由水平轨道和在竖直平面内的三个圆形轨道组成,B、C、D分别是三个圆形轨道的最低点,B、C间距与C、D间距相等,半径R1=2m、R2=1.4m.](/uploads/image/z/11288901-21-1.jpg?t=%E8%BF%87%E5%B1%B1%E8%BD%A6%E6%98%AF%E6%B8%B8%E4%B9%90%E5%9C%BA%E4%B8%AD%E5%B8%B8%E8%A7%81%E7%9A%84%E8%AE%BE%E6%96%BD.%E4%B8%8B%E5%9B%BE%E6%98%AF%E4%B8%80%E7%A7%8D%E8%BF%87%E5%B1%B1%E8%BD%A6%E7%9A%84%E7%AE%80%E6%98%93%E6%A8%A1%E5%9E%8B%2C%E5%AE%83%E7%94%B1%E6%B0%B4%E5%B9%B3%E8%BD%A8%E9%81%93%E5%92%8C%E5%9C%A8%E7%AB%96%E7%9B%B4%E5%B9%B3%E9%9D%A2%E5%86%85%E7%9A%84%E4%B8%89%E4%B8%AA%E5%9C%86%E5%BD%A2%E8%BD%A8%E9%81%93%E7%BB%84%E6%88%90%2CB%E3%80%81C%E3%80%81D%E5%88%86%E5%88%AB%E6%98%AF%E4%B8%89%E4%B8%AA%E5%9C%86%E5%BD%A2%E8%BD%A8%E9%81%93%E7%9A%84%E6%9C%80%E4%BD%8E%E7%82%B9%2CB%E3%80%81C%E9%97%B4%E8%B7%9D%E4%B8%8EC%E3%80%81D%E9%97%B4%E8%B7%9D%E7%9B%B8%E7%AD%89%2C%E5%8D%8A%E5%BE%84R1%3D2m%E3%80%81R2%3D1.4m.)
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