在物理学习过程中,我们可以总结出一些模型,这些模型具有一定的普遍性,我们将其应用到相关问题中,将会使解题更为方便。下面笔者分别讨论了两种模型以及它们在解题过程中的运用。一、模型1一条长1=5m的细绳,两端分别系于竖立在地面上相距d=4m的两杆的顶端A、B,如图1所示。滑轮下挂着一个重为12N的物体,物体保持静止,此时两杆的顶端受到多大的拉力? In the process of physics learning, we can summarize some models, which have a certain universality. We apply them to the related questions and will make the solution more convenient. The following author separately discussed two models and their use in the process of solving problems. First, the model 1 a long 1 = 5m rope, tied at both ends were erected on the ground d = 4m away from the top of the two A, B, shown in Figure 1. Under the pulley hanging a weight of 12N objects, objects remain stationary, at this time the top of the two rods by how much tension?