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範例 37：雨水在球面滑落的軌跡 |
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有一個橄欖球放在地上，其表面方程式為：
假設 毛毛雨垂直向下輕輕落到球面，求雨水在球面滑落的軌跡？
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《 解答 》 |
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在球面上一點  的法向量  ，
 在  平面的投影  是水珠水平位移的方向。
 ，軌跡為與球面的交線。 |
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About
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This document
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