Student understanding of the work‐energy and impulse‐momentum theorems
Student understanding of the work‐energy and impulse‐momentum theorems
复制标题
学生对功能量和冲量动量定理的理解
DOI：
10.1119/1.14994
复制
发表时间：
1987
影响因子：
0.9
通讯作者：
L. McDermott
中科院分区：
文献类型：
--
作者：
R. Lawson;L. McDermott
学生对冲量-动量和功-能定理的理解是通过任务的表现来评估的，这些任务需要将这些关系应用到实际运动的分析中。这项研究的参与者是参加微积分物理入门课程荣誉部分或常规代数课程的本科生。学生们被要求比较两个无摩擦的干冰球在相同恒定力的影响下直线移动时动量和动能的变化。调查结果显示，大多数学生无法将课堂上学到的代数形式主义与他们观察到的简单运动联系起来。
Student understanding of the impulse‐momentum and work‐energy theorems was assessed by performance on tasks requiring the application of these relationships to the analysis of an actual motion. The participants in the study were undergraduates enrolled in either the honors section of a calculus‐based introductory physics course or in the regular algebra‐based course. The students were asked to compare the changes in momentum and kinetic energy of two frictionless dry‐ice pucks as they moved rectilinearly under the influence of the same constant force. The results of the investigation revealed that most of the students were unable to relate the algebraic formalism learned in class to the simple motion that they observed.