二維彈性碰撞教學新解暨演示實驗

A New Teaching Strategy for Two-Dimensional Elastic Collisions

洪耀正(Yao-Chen Hung) ； 鄭翰陽(Han-Yang Cheng) ； 江俊明(Chun-Ming Chiang)

《物理教育學刊》 16卷1期 (2015/07) Pp. 33-39

摘要

在傳統物理課本討論碰撞的章節中，二維彈性碰撞一直沒有一個較為直觀的理論推導與教學演示實驗。在此我們介紹一個簡易的理論教學策略，同時利用桌上冰球玩具模組(Air Hocker)佐以便宜的高速攝影相機與公共授權軟體Tracker，進行二維彈性碰撞的演示教學。透過這樣的理論介紹與實驗展示，老師能夠更為容易地傳達關於二維碰撞運動的物理知識，同時也可以引起學生的學習興趣，並藉此培養其數值分析處理的能力。

關鍵字

二維彈性碰撞 ； Tracker

並列摘要

A new teaching strategy is proposed for two-dimensional elastic collisions, including an intuitive theoretical explanation and a simple lecture experiment. In the lecture experiment, an Air Hocker serves as a frictionless surface, and a high-speed camera is used to record the trajectories of the colliding objects. The trajectories can be quantified by means of a free-software package, Tracker, for the purpose of further analysis. Based on the experiment, the colliding phenomena predicted theoretically can be demonstrated directly and easily in class. Teachers can therefore attract students' interest in the problems of two-dimensional collisions.

並列關鍵字

two-dimensional elastic collisions ； tracker