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有关浮力的知识是初中物理力学部分的重点内容,在学过新课之后,为了加深理解,巩固所学,需要完成一定数目的练习。这类题目往往变化较多,且综合性较强,常常要涉及到受力分析、密度、压强等有关知识,学生普遍感到棘手,解题时也容易出现错误。教师应该适时指导、帮助学生分析解题思路,总结解题经验,以求得较好的解题方法。下面通过几个实例,对学生解题时出现的错误及出现错误的原因作些肤浅和的分析。
The knowledge about buoyancy is a key part of the physics and mechanics part of junior middle school. After learning new lessons, in order to deepen understanding and consolidate the study, a certain number of exercises need to be completed. Such topics often have more changes and are more comprehensive. They often involve relevant knowledge such as stress analysis, density, and pressure. Students generally find it difficult to handle problems and are prone to errors when solving problems. Teachers should guide and help students analyze the problem-solving ideas in a timely manner, and summarize the problem-solving experience in order to obtain better solutions. Here are a few examples that provide some superficial analysis of students’ mistakes and the reasons for their mistakes.