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一、动力学两类基本问题(1)已知物体的受力情况,要求物体的运动情况.如物体运动的位移、速度及时间等.(2)已知物体的运动情况,要求物体的受力情况(求力的大小和方向).两类动力学基本问题的解题思路图解如图1所示:由图1可见,不论求解那一类问题,求解加速度是解题的桥梁和纽带,是顺利求解的关键.二、整体法、隔离法1.整体法.在研究物理问题时,把所研究的对象作为一个整体来处理的方法称为整体法.采用整体法时不仅可以把几个物体作为整体,也可以把几个物理过程作为一个整体,采
First, the two basic types of dynamics problems (1) the known object force situation, the requirements of objects such as movement, such as the movement of objects, speed and time, etc .. (2) Known object movement, the object subject Force situation (for the size and direction) .Two types of kinematics basic problem solving ideas diagram shown in Figure 1: Can be seen from Figure 1, no matter what kind of problem solving, solving acceleration is the bridge and link to solve the problem, Is the key to smooth the solution. Second, the overall law, isolation law 1. The overall law. In the study of physical problems, the study of the object as a whole to deal with the method as a whole law .Use of the whole law can not only put a few Objects as a whole can also take several physical processes as a whole