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动量定理

> ⑴小球滑到最低点 B时，小球速度 v的大小； ⑵小球刚到达最低点 B时，轨道对小球支持力 F N的大小； ⑶小球通过光滑的水平面 BC滑上固定曲面，恰达最高点 D， D到地面的高度为 h（已知 h＜ R），则小球在曲面上克服摩擦力所做的功 Wf.

问题：

发布时间：2024-09-12

⑴小球滑到最低点 B时，小球速度 v的大小；
⑵小球刚到达最低点 B时，轨道对小球支持力 F _N的大小；
⑶小球通过光滑的水平面 BC滑上固定曲面，恰达最高点 D， D到地面的高度为 h（已知 h＜ R），则小球在曲面上克服摩擦力所做的功 W_f.

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