An Atwood-type machine is investigated in which one block moving along a frictionless horizontal track is connected by a string over an ideal pulley to a hanging block. In the usual setup, the pulley is located at the corner between the end of the track on a tabletop and a vertical drop down to the floor. An alternative geometry analysed by Herrera-Surez, Machado-Higuera, and Muoz (Phys. Educ. 55 055022) raises the pulley above this corner, so that the portion of the string connecting the pulley to the horizontally moving block makes a nonzero angle relative to the track. Assuming the track extends beyond the edge of the table, both blocks are shown here to exhibit oscillations about the equilibrium configuration as the horizontal block passes under the pulley.

研究了一种Atwood型机器，其中，沿着无摩擦水平轨道移动的一个木块通过一根绳子在理想的皮带轮上连接到一个悬挂木块上。在通常的设置中，滑轮位于桌面上的轨道末端和垂直下降到地板之间的拐角处。通过埃雷拉-Surez，马查多-伊格拉，和Muoz分析的替代几何结构（物理学。EDUC。 55 055022）提出了上述这个角落的滑轮，使得连接所述滑轮的水平移动块字符串的部分使非零角度相对于跟踪。假设轨道延伸到桌子的边缘之外，此处显示的两个滑块在水平滑块经过皮带轮下方时均显示出围绕平衡构型的振荡。