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对于高中物理下册第一章练习四第七题,不少学生感到抽象难解。这是因为高中阶段只要求了解振动的合成,并且仅限于同一直线上简谐振动的合成,而该题已属于相互垂直的两个简谐振动的合成,作为结果的再个曲线就是两个李萨如图。尽管如此,通过习题课使学生彻底弄通该题,对培养学生综合运用数理知识的能力和思维想象能力仍有一定作用。几年来在处理该题时我们均采用了如下三个步骤,取得了较好效果。
For the high school physics under the first chapter practice fourth seven questions, many students feel absurd. This is because the high school stage only needs to know the synthesis of vibration and is limited to the synthesis of simple harmonic vibrations on the same straight line. However, this problem belongs to the synthesis of two simple harmonic vibrations perpendicular to each other. As a result, Sa figure. However, through exercises to enable students to thoroughly get through the problem, to develop students ability to use mathematical knowledge and imagination still have a certain effect. In the past few years, we have adopted the following three steps in dealing with the problem and achieved good results.