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正确分析物体的受力情况,是研究力学问题的关键,是必须掌握的基本功.分析物体的受力情况时主要依据各种力所产生的条件,从物体所处的环境和运动状态着手,分析它和所处环境的其它物体间的相互联系.以下几个问题是要重点把握的.
Correctly analyzing the stress condition of an object is the key to the study of mechanics problems. It is a basic skill that must be mastered. Analysing the force condition of an object mainly depends on the conditions generated by various forces, starting from the environment and the motion state of the object, and analyzing Its interaction with other objects in the environment. The following questions are important to grasp.