近年的高考物理试题中关于动能定理的考查内容显著增多,为了加强学生对动能定理的掌握程度,就需要在动能定理的教学中引入适当的教学策略,并重视解题方法,开拓学生思维。要想发现和掌握动能定理的巧妙方法,就需要坚实的基础做后盾,这样解题时才能有理有据。例1有A、B两块水平金属板正对放置,这两块金属板分别带着等量的异号电荷。若有一带电微粒水平射入两板间,其受到重力与电场力的共同作用运动轨迹如图1,下列说法中正确的是() In recent years, the physical examination questions in the physical examination of college entrance examination have significantly increased. In order to strengthen students ’mastery of the kinetic energy theorem, appropriate teaching strategies should be introduced in the teaching of kinetic energy theorems, and emphasis should be laid on problem solving and students’ thinking. To find and master the ingenious method of kinetic energy theorem, we need a solid foundation to do the backing, so that when the problem can be justified. Example 1 has A, B two horizontal metal plate is placed in pairs, the two metal plates with the same amount of different sign charge. If there is a charged particle level into the two plates, which by gravity and electric field force interaction trajectory shown in Figure 1, the following statement is correct ()