求解物理问题的关键是正确地选取“研究对象、物理过程和物理规律”.在选取研究对象和物理过程时,可以对多个对象进行整体思维和对多个过程进行整体思维,但在对多个物理过程进行整体思维时,很容易忽视某些瞬时过程中机械能的损失、相对运动、内力等.所以进行整体思维也必须以弄 The key to solving physical problems is to correctly select “research objects, physical processes, and physical laws.” When selecting research objects and physical processes, it is possible to perform overall thinking on multiple objects and to perform overall thinking on multiple processes, but on many When thinking about the whole physical process, it is easy to overlook the loss of mechanical energy, relative motion, and internal forces in some transient processes.