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研究物体受力平衡问题是物理学应用中的重要课题,也是中学物理学习的重要内容.现在让我们就此进行有益的探讨.一、认识平衡条件在力学中,通常将物体相对于惯性系运动状态不随时间改变的状态叫作平衡状态.用一句通俗的话来说那就是:“静者恒静,动者恒动”.物体的机械运动有平动和转动两种形式,所谓平动,指的是物体各部分运动情况都相同的运动,而转动则是指物体中各点都绕同一圆心做圆周运动的运动形式.对于平动来说,平衡意味着物体始终保持恒定的速度作匀速直线运
Studying the force balance of objects is an important issue in the application of physics, and it is also an important part of physics learning in middle schools. Now let us discuss this in a useful way. I. Understanding the equilibrium conditions In mechanics, objects are usually related to inertial systems. The state that does not change over time is called equilibrium state. In a popular phrase, it is: “The static person is static, the activist is always moving.” The mechanical movement of the object has two forms of translation and rotation. The so-called translational motion refers to It is the movement of all parts of the object that are the same, and the rotation is the movement of the points in the object to do a circular motion around the same center. For the translation, the balance means that the object always maintain a constant speed for a constant speed