利用v-t图像解决复杂动力学问题——2021年高考山东物理卷第18题评析  

Solving the Complex Dynamics Questions Using v-t Images——Evaluating and Analyzing the 18 th Question of Shandong Physics Volume in 2021 National College Entrance Examination

作　　者：方润根 叶晟波[2] 余潘 FANG Rungen;YE Shengbo;YU Pan(Hangzhou Xuejun Middle School,Hangzhou,Zhejiang 310014;Zhejiang Cixi Middle School,Ningbo,Zhejiang 315300)

机构地区：[1]杭州学军中学,浙江杭州310014 [2]浙江省慈溪中学,浙江宁波315300

出　　处：《物理通报》2023年第10期87-89,共3页Physics Bulletin

摘　　要：2021年高考山东物理卷第18题是一道非常复杂的动力学压轴题,尤其是第3小题,学生的解答结果基本与答案不一致,是该题中最难理解的部分,学生们对此很疑惑.利用v-t图像,清晰地将复杂的运动简洁、直观地展现出来,并从地面系v-t图像和质心系v-t图像两个角度证明结果的正确性,有效地帮助学生解决困惑,进一步提高学生处理复杂动力学问题的能力.The 18th physics question of Shandong physics volume in 2021 national college entrance examination is a very complex dynamic finale question,especially the third sub question.The students′answers are basically inconsistent with the answers,which is the most difficult part of the question to understand.Students are very confused about this.This article uses v-t images to clearly present complex movements in a concise and intuitive manner,and proves the correctness of the results from the perspectives of ground system v-t images and centroid system v-t images,effectively helping students solve confusion and further improving their ability to handle complex dynamic questions.

关 键 词：2021年高考山东物理卷 V-T图像 动力学问题 参考系 

分 类 号：G634.7[文化科学—教育学]