如图,AB为粗糙的长直轨道,与水平方向的夹角为37°,BCD为光滑曲线轨道,两段轨道在B处光滑连接.B、C、D三点离水平地面的高度分别为h1=0.50m,h2=1.75m和h3=1.50m.一质量m=0.20kg的小环套在轨道AB
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![如图,AB为粗糙的长直轨道,与水平方向的夹角为37°,BCD为光滑曲线轨道,两段轨道在B处光滑连接.B、C、D三点离水平地面的高度分别为h1=0.50m,h2=1.75m和h3=1.50m.一质量m=0.20kg的小环套在轨道AB](/uploads/image/z/8487503-71-3.jpg?t=%E5%A6%82%E5%9B%BE%2CAB%E4%B8%BA%E7%B2%97%E7%B3%99%E7%9A%84%E9%95%BF%E7%9B%B4%E8%BD%A8%E9%81%93%2C%E4%B8%8E%E6%B0%B4%E5%B9%B3%E6%96%B9%E5%90%91%E7%9A%84%E5%A4%B9%E8%A7%92%E4%B8%BA37%C2%B0%2CBCD%E4%B8%BA%E5%85%89%E6%BB%91%E6%9B%B2%E7%BA%BF%E8%BD%A8%E9%81%93%2C%E4%B8%A4%E6%AE%B5%E8%BD%A8%E9%81%93%E5%9C%A8B%E5%A4%84%E5%85%89%E6%BB%91%E8%BF%9E%E6%8E%A5.B%E3%80%81C%E3%80%81D%E4%B8%89%E7%82%B9%E7%A6%BB%E6%B0%B4%E5%B9%B3%E5%9C%B0%E9%9D%A2%E7%9A%84%E9%AB%98%E5%BA%A6%E5%88%86%E5%88%AB%E4%B8%BAh1%EF%BC%9D0.50m%2Ch2%EF%BC%9D1.75m%E5%92%8Ch3%EF%BC%9D1.50m.%E4%B8%80%E8%B4%A8%E9%87%8Fm%EF%BC%9D0.20kg%E7%9A%84%E5%B0%8F%E7%8E%AF%E5%A5%97%E5%9C%A8%E8%BD%A8%E9%81%93AB)
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