向心加速度公式的教具制作及其教学研究——基于Tracker和Phyphox软件的定量探究

Teaching Aids Making and Its Teaching Research on Centripetal Acceleration Formula——Quantitative Research Based on Tracker and Phyphox Software

从教具制作、定量实验探究和教学启示等三方面来探究匀速圆周运动的向心加速度公式,即利用自制教具探究向心加速度a c与圆周运动半径r和角速度ω之间的定量关系.实验发现,结果非常好地符合理论预期.最后讨论了该教具所蕴含的教学启示,可以将其设计成适合高中物理教学的验证性、探究性实验及课外科创活动,从而培养学生的科学探究能力、科学推理能力、动手协作能力和问题解决能力.本教具还提供了测量当地重力加速度的一种新方法.

This article explores the centripetal acceleration formula of uniform circular motion from three aspects of teaching aids making,quantitative experimental research and teaching enlightenment,that is,the quantitative relationship between the centripetal acceleration a c the circular motion radius r and the angular velocityωis explored by self-made teaching aids.It is found that the results are in perfect agreement with the theoretical expectation.Finally,this work can be designed as the verification,inquiry experiments and extracurricular scientific innovation activities suitable for high school physics teaching,so as to cultivate students′scientific inquiry ability,scientific reasoning ability,hands-on cooperation ability and problem-solving ability.This teaching aids also provide a new method to measure the local gravitational field strength.