一道物理题,(有点怀疑选项是不是错的,但书上确实是这么写)答案是D,为什么?如图所示,质量为M的楔形物块静止在水平地面上,其斜面的倾角为θ.斜面上有一质量为m的小物块,小物块与斜面之
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![一道物理题,(有点怀疑选项是不是错的,但书上确实是这么写)答案是D,为什么?如图所示,质量为M的楔形物块静止在水平地面上,其斜面的倾角为θ.斜面上有一质量为m的小物块,小物块与斜面之](/uploads/image/z/8335200-48-0.jpg?t=%E4%B8%80%E9%81%93%E7%89%A9%E7%90%86%E9%A2%98%2C%EF%BC%88%E6%9C%89%E7%82%B9%E6%80%80%E7%96%91%E9%80%89%E9%A1%B9%E6%98%AF%E4%B8%8D%E6%98%AF%E9%94%99%E7%9A%84%2C%E4%BD%86%E4%B9%A6%E4%B8%8A%E7%A1%AE%E5%AE%9E%E6%98%AF%E8%BF%99%E4%B9%88%E5%86%99%EF%BC%89%E7%AD%94%E6%A1%88%E6%98%AFD%2C%E4%B8%BA%E4%BB%80%E4%B9%88%3F%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA%2C%E8%B4%A8%E9%87%8F%E4%B8%BAM%E7%9A%84%E6%A5%94%E5%BD%A2%E7%89%A9%E5%9D%97%E9%9D%99%E6%AD%A2%E5%9C%A8%E6%B0%B4%E5%B9%B3%E5%9C%B0%E9%9D%A2%E4%B8%8A%2C%E5%85%B6%E6%96%9C%E9%9D%A2%E7%9A%84%E5%80%BE%E8%A7%92%E4%B8%BA%CE%B8.%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%E5%B0%8F%E7%89%A9%E5%9D%97%2C%E5%B0%8F%E7%89%A9%E5%9D%97%E4%B8%8E%E6%96%9C%E9%9D%A2%E4%B9%8B)
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