注重问一下第二问怎么想如图所示,固定轨道ABCD由斜面轨道AB和圆弧轨道BCD组成,AB与BCD相切于B点.质量M=3kg的三角形木块DEF静置于光滑水平地面上,木块的斜面DE与圆弧BCD相切于D点.质量m=l kg
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![注重问一下第二问怎么想如图所示,固定轨道ABCD由斜面轨道AB和圆弧轨道BCD组成,AB与BCD相切于B点.质量M=3kg的三角形木块DEF静置于光滑水平地面上,木块的斜面DE与圆弧BCD相切于D点.质量m=l kg](/uploads/image/z/8983466-26-6.jpg?t=%E6%B3%A8%E9%87%8D%E9%97%AE%E4%B8%80%E4%B8%8B%E7%AC%AC%E4%BA%8C%E9%97%AE%E6%80%8E%E4%B9%88%E6%83%B3%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%2C%E5%9B%BA%E5%AE%9A%E8%BD%A8%E9%81%93ABCD%E7%94%B1%E6%96%9C%E9%9D%A2%E8%BD%A8%E9%81%93AB%E5%92%8C%E5%9C%86%E5%BC%A7%E8%BD%A8%E9%81%93BCD%E7%BB%84%E6%88%90%2CAB%E4%B8%8EBCD%E7%9B%B8%E5%88%87%E4%BA%8EB%E7%82%B9%EF%BC%8E%E8%B4%A8%E9%87%8FM%3D3kg%E7%9A%84%E4%B8%89%E8%A7%92%E5%BD%A2%E6%9C%A8%E5%9D%97DEF%E9%9D%99%E7%BD%AE%E4%BA%8E%E5%85%89%E6%BB%91%E6%B0%B4%E5%B9%B3%E5%9C%B0%E9%9D%A2%E4%B8%8A%2C%E6%9C%A8%E5%9D%97%E7%9A%84%E6%96%9C%E9%9D%A2DE%E4%B8%8E%E5%9C%86%E5%BC%A7BCD%E7%9B%B8%E5%88%87%E4%BA%8ED%E7%82%B9%EF%BC%8E%E8%B4%A8%E9%87%8Fm%3Dl+kg)
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