大学物理 ›› 2026, Vol. 45 ›› Issue (1): 25-.doi: 10.16854/j.cnki.1000-0712.250139

• 教学讨论 • 上一篇    下一篇

方程析理,物用为功——一元三次方程在物理问题解决中的应用探析

吴寿宠,肖飞   

  1. 1. 贵州省凯里市第一中学,贵州凯里 556000;2.北京师范大学贵安新区附属学校,贵州贵阳 550031 
  • 收稿日期:2025-03-15 修回日期:2025-05-25 出版日期:2026-04-13 发布日期:2026-04-19
  • 作者简介:吴寿宠(1993—),男,贵州黄平人,贵州省凯里市第一中学物理教师,硕士,研究方向为大中衔接物理教学.
  • 基金资助:
    2024年黔东南州教育科学规划重点课题《“三新”背景下高中物理教学中培育质疑创新思维的实践研究》(立项编号2024A015)

application of univariate cubic equations in solving physics problems

WU Shouchong1, XIAO Fei2   

  1. 1. Kaili No.1 High School, Kaili, Guizhou 556000, China;
    2. Beijing Normal University Guian New Area Affiliated School, Guiyang, Guizhou 550031, China

  • Received:2025-03-15 Revised:2025-05-25 Online:2026-04-13 Published:2026-04-19

摘要: 本文系统探讨了一元三次方程在高中物理问题解决中的建模应用及其简化求解策略.通过对重力场中的抛物线轨迹交点判定和滑块脱离半球临界条件分析、静电场中点电荷的平衡位置求解与电磁场中带电粒子的运动轨迹优化等典型物理问题的讨论,揭示了一元三次方程与物理模型的关联性,并基于有理根定理进行因式分解降阶求解,有效规避繁琐的求根公式,展示了代数工具解决物理问题的独特优势.研究既体现了数学解析的严谨性,又注重物理意义的诠释,具有学科交叉的前沿价值.此外,文章还探讨了生成式人工智能技术在方程参数合理设计中的辅助作用,为试题命制提供数据设置优化思路.本研究为高中物理教学中数学工具的应用及科学思维培养提供了实践参考,具有一定教学启示与命题指导价值.


关键词: 一元三次方程, 有理根定理, 物理问题, 生成式人工智能

Abstract: This article illustrates the application of cubic equations in solving problems related to kinematics, dynamics, gravitational fields, electrostatic fields, and electromagnetic fields through five presented examples. These examples include mock exam questions from various provinces and cities as well as real exam questions from the college entrance examination. Using techniques such as rational root theorem and reasonable approximation, examples are given of how cubic equations can be factorized. Finally, the characteristics of high school physics problems involving cubic equations in analysis and solution are discussed, and examples are provided for reference on how to combine generative artificial intelligence software to empower test question design and teaching expansion. 


Key words: cubic equation, logical root theorem, physical issues, generative AI