在倾角为得足够长的光滑斜面上有一质量为m的物体,他受到沿斜面方向如图所示,在倾角为30°的足够长的光滑斜面上有一质量为m的物体,它受到沿斜面方向的力F的作用.力F可按图(a)、(b)
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![在倾角为得足够长的光滑斜面上有一质量为m的物体,他受到沿斜面方向如图所示,在倾角为30°的足够长的光滑斜面上有一质量为m的物体,它受到沿斜面方向的力F的作用.力F可按图(a)、(b)](/uploads/image/z/13044572-44-2.jpg?t=%E5%9C%A8%E5%80%BE%E8%A7%92%E4%B8%BA%E5%BE%97%E8%B6%B3%E5%A4%9F%E9%95%BF%E7%9A%84%E5%85%89%E6%BB%91%E6%96%9C%E9%9D%A2%E4%B8%8A%E6%9C%89%E4%B8%80%E8%B4%A8%E9%87%8F%E4%B8%BAm%E7%9A%84%E7%89%A9%E4%BD%93%2C%E4%BB%96%E5%8F%97%E5%88%B0%E6%B2%BF%E6%96%9C%E9%9D%A2%E6%96%B9%E5%90%91%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%2C%E5%9C%A8%E5%80%BE%E8%A7%92%E4%B8%BA30%C2%B0%E7%9A%84%E8%B6%B3%E5%A4%9F%E9%95%BF%E7%9A%84%E5%85%89%E6%BB%91%E6%96%9C%E9%9D%A2%E4%B8%8A%E6%9C%89%E4%B8%80%E8%B4%A8%E9%87%8F%E4%B8%BAm%E7%9A%84%E7%89%A9%E4%BD%93%2C%E5%AE%83%E5%8F%97%E5%88%B0%E6%B2%BF%E6%96%9C%E9%9D%A2%E6%96%B9%E5%90%91%E7%9A%84%E5%8A%9BF%E7%9A%84%E4%BD%9C%E7%94%A8%EF%BC%8E%E5%8A%9BF%E5%8F%AF%E6%8C%89%E5%9B%BE%EF%BC%88a%EF%BC%89%E3%80%81%EF%BC%88b%EF%BC%89)
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