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在解决带电体在不同场中的复杂运动时,解决问题的关键在于能够准确分析运动过程中物体所受到的力,灵活运用运动的合成与分解知识,化复杂运动为我们熟悉的基本运动来处理.下面就带电体在几种不同场中的复杂运动举例说明处理方法.例1一个质量为m、电荷量为+q的小球以初速度v_0水平抛出,在小球经过的竖直的平面内,存在着若干个如图1所示的无电场区和有理想上下边界的匀强电场区,两区域相互间隔、竖直高度相等,电场区水平方向无限长,已知每一电场区的场强大小相等、方向均竖直向上,不计空气阻力,下列说法正确的是()
When solving the complex motion of a charged body in different fields, the key to solving the problem lies in accurately analyzing the force that the object receives during the movement, flexibly using the knowledge of motion synthesis and decomposition, and complicating the complex motion to handle the basic motions we are familiar with. The following example illustrates the processing method of the complex motion of a charged body in several different fields. Example 1 A ball with a mass of m and a charge of +q is ejected at the initial velocity v_0 level, passing through the ball In the plane, there are several non-electric fields as shown in Fig. 1 and a uniform electric field with ideal upper and lower boundaries. The two areas are separated from each other and their vertical heights are equal. The electric field is infinite in the horizontal direction. Each electric field is known. The field strength is equal and the directions are all vertical upwards, excluding air resistance. The following statement is correct ()