If a rod is held almost vertically with one end at rest on a horizontal surface then it will fall to the surface when released. The rod might pivot about its bottom end or it might slide forwards or backwards on the surface, depending on the coefficient of friction. Experimental and theoretical results are presented for a rod with a spherical bottom end. In that case the rod rolls on its bottom end before sliding backwards and/or forwards. Results for a 1.0m ruler are also presented.

中文翻译：

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斜杆的坠落

如果一根杆几乎垂直地握住，一端静止在水平表面上，那么在松开时它会落到表面上。根据摩擦系数，杆可能围绕其底端旋转，也可能在表面上向前或向后滑动。给出了具有球形底端的杆的实验和理论结果。在那种情况下，杆在向后和/或向前滑动之前在其底端滚动。还提供了 1.0m 标尺的结果。