论文部分内容阅读
解答物理选择题中常用的思考方法。可以总结如下八种: 一、整体方法整体方法(又称系统方法)就是以整体作为研究对象的解题方法。有些物理问题,若从整体出发加以考虑,可省去较繁琐的推导、运算过程,给解题带来方便。例1(1990年全国高考题)用轻质细线把两个质量未知的小球悬挂起来,如图1所示。今对小球a持续施加一个向左偏下30°的恒力,并对小球b持续施加一个向右偏上30°的同样大的恒力,最后达到平衡,表示平衡状态的图可能是图2中的:
Solve common thinking methods in physical multiple choice questions. The following eight types can be summarized: First, the overall approach The overall approach (also known as the system approach) is to use the overall approach as the research object. Some physics problems, if taken into consideration from the overall point of view, can save the cumbersome process of derivation and calculation, and bring convenience to problem solving. Example 1 (National Examination Questions in 1990) Suspend two small balls of unknown quality with light and thin lines, as shown in Figure 1. A constant force of 30° to the left is continuously applied to the ball a, and an equally large constant force of 30° to the right is continuously applied to the ball b, and finally the balance is reached. The graph indicating the equilibrium may be In Figure 2: