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物理问题,千变万化,这常使中学生摸不清头绪.掌握解物理题的基本方法对迅速提高解题能力是很有帮助的.一、过程分析法弄清楚物理过程,问题几乎就解决了一半.过程分析有时要借助于作图、列表等手段.例1 一只烧杯盛满水时,称得其总质量为250克,放入小石子溢出一部分水后,称得总质量为300克,把石子取出后,称得盛水烧杯总质量为200克,求石子的密度.
Physical problems are ever-changing, which often make it difficult for middle school students to understand. Mastering the basic method of solving physical problems is helpful to quickly improve problem-solving abilities. First, process analysis clarifies the physical process, and the problem is almost half solved. Process analysis is sometimes done by means of graphing, lists, etc. Example 1 When a beaker is full of water, the total mass is 250 g. After pouring a small stone into a portion of the water, the total mass is 300 g. After the stone is removed, the total mass of the beaker is 200 g. Find the density of the stone.