带电粒子在复合场中的运动问题,物理情景比较复杂,是高考命题的热点.这部分内容从本质上讲是一个力学问题,解题时,只要建立正确的运动模型,根据力学问题的研究思路和运用力学的基本规律就可顺利求解.现将基本运动模型归纳如下,供同学们参考.1匀速直线运动图1例1设在地面上方的 The motion problem of charged particles in the complex field is more complex than the physical scenario. It is a hot topic of the college entrance examination proposition. This part of the content is essentially a mechanical problem. When solving the problem, as long as the correct motion model is established, the research ideas based on the mechanical problems are taken into consideration. And the basic laws of the use of mechanics can be successfully solved. Now the basic motion model is summarized as follows for students to refer to. 1 uniform linear motion diagram 1 case 1 is located above the ground