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在对物体的运动状态进行分析时,利用物理的基本原理而不进行繁琐的数学计算对物理问题进行定性或者半定量分析往往是简捷和准确的。尤其是当某些问题看起来相当简单,或相当复杂的情况下,人们更倾向于根据直觉推理进行直接了当的定性分析。比如,在保守系统中,物体在有心力的作用下一般要做闭轨道的椭圆或圆周运动;物体在受到周期性的外力作用时一般要做周期振动;带电物体在磁场中一般要做螺线形运动,等等。但是,在对物理问题有了清楚的理解之后,运动方程加初始条件
In the analysis of the motion state of an object, the qualitative or semi-quantitative analysis of the physical problem using the basic principles of physics without tedious mathematical calculations is often simple and accurate. Especially when certain problems seem to be quite simple, or rather complicated, people tend to perform straightforward qualitative analysis based on intuition. For example, in a conservative system, an object is generally subjected to closed-track elliptical or circular motion under the influence of a force; an object is generally to be periodically vibrated when subjected to a periodic external force; a charged object is generally to be spiralized in a magnetic field. Exercise, etc. However, after having a clear understanding of the physical problem, the equation of motion plus the initial conditions