动态平衡类题型由于其能够综合考查学生的受力分析、空间想象力和运用数学知识处理物理问题能力而深受命题者的青睐。一般情况下,动态平衡题型仅仅考查三力平衡,且一般只出现在选择题中,不涉及具体的计算过程。从分析求解的角度来看,大致可以 The dynamic balance question type is favored by the proponents because of its ability to comprehensively examine students’ force analysis, spatial imagination and the ability to use mathematical knowledge to deal with physical problems. Under normal circumstances, the dynamic balance test only examines the balance of three forces, and generally only appear in the multiple-choice questions, does not involve a specific calculation process. From the perspective of analytical solution, it can be roughly