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力学中平衡问题的计算、特别是连接体平衡的计算,历来是初中学生感到最难解决的问题之一,笔者在教学中指导学生利用四步骤解题法解决此类问题,成功地化解了这一难题.所谓四步骤解题法,就是按照:确定研究对象一分析物体受力情况、画出物体受力图一列方程(组)一解方程(组)这样四个步骤的解题方法.由于此法把解题过程程序化,使应用者在解题时有章可循,且把代数知识和物理知识有机地结合在一起,因此具有极好的解题效果.
The calculation of balance problems in mechanics, especially the calculation of linker balances, has always been one of the most difficult problems for junior middle school students. The author instructed students to use the four-step problem-solving method to solve such problems and succeeded in solving this problem. A problem. The so-called four-step problem-solving method is based on the following: to determine the object of the study - to analyze the force of an object, to draw the object force diagram, an equation (group), a solution equation (group), a four-step solution method. This method proceduralizes the problem-solving process, so that the user has a rule to follow when solving the problem, and combines the algebraic knowledge and physics knowledge organically, so it has an excellent solution to the problem.