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筷子搭碗是典型的初中物理竞赛题,普遍出现在各种教辅书和高中自主招生试题中.本文所举的例题,常见解法要用到高中知识,超出了初中生的能力范畴.笔者先后构建物理模型和数学模型,通过数理结合,在初中知识的框架内解决问题,能有效激发学生的学习兴趣,体现初中物理竞赛的内涵和品质.
Chopsticks bowl is a typical junior high school physics competitions, generally appear in a variety of supplementary books and high school self-enrollment test questions .This article cited examples, common solutions to use high school knowledge, beyond the ability of junior high school students. The physical model and the mathematical model are constructed. Through the combination of mathematics and physics, the problem can be solved within the framework of junior high school knowledge, which can effectively arouse students’ interest in learning and reflect the connotation and quality of junior high school physics competition.