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物理学中有些问题与多种因素(即多个变量)有关,对这类问题我们可以采用控制因素(变量)的方法,即把多因素的问题转变为多个单因素的问题,分别加以研究,最后再综合解决,这类方法叫做控制变量法.下面结合例题谈谈这种方法的应用.例1:(a)、(b)两图分别表示比较运动员游泳快慢的两种方法.其中图(a)表明_________.图(b)表明____________.
Some problems in physics are related to a variety of factors (ie, multiple variables). We can use the method of controlling factors (variables) for such problems, that is, turning multi-factor problems into multiple single-factor problems and study them separately. Finally, a comprehensive solution is given. Such a method is called the control variable method. The following examples are used to talk about the application of this method. Example 1: (a), (b) Two figures show the two methods to compare the speed of swimming athletes. (a) indicates _________. Figure (b) indicates ____________.