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动量和能量综合题中研究对象多、物理过程繁,求解时提倡用整体法(研究对象的整体性和研究过程的整体性).一个物理问题常常是由一个个相对独立的物理过程衔接而成,每个过程都遵循一定的物理规律,但有时可以将研究对象所经历的不同过程合并成一个整体来研究,经整体分析后,可以对全过程一步列式求解,这样可以减少所列的方程,简化解题过程,使求解简捷方便.例1 (2007年江苏高考物理题18)如图1
There are many research objects in the synthesis of momentum and energy, and there are many physical processes. The holistic approach is advocated in the solution (the integrity of the research object and the integrity of the research process). A physical problem is often formed by a relatively independent physical process. Each process follows a certain physics law, but sometimes the different processes experienced by the research object are merged into a whole to study. After the overall analysis, the whole process can be solved step by step, so that the listed equations can be reduced. , Simplify the problem solving process, so that the solution is simple and convenient. Example 1 (2007 Jiangsu College Entrance Exam 18) Figure 1