An Inexpensive Apparatus to Study Conservation of Angular Momentum in the Introductory Laboratory

While the three laws of conservation of energy, momentum, and angular momentum are all mentioned in introductory textbooks, there are few experiments through which students can investigate the conservation of angular momentum. Most experiments consist of collisions between rotating disks, in which o...

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Bibliographic Details
Published inThe Physics teacher Vol. 59; no. 6; pp. 426 - 427
Main Author Polley, J. P
Format Journal Article
LanguageEnglish
Published American Association of Physics Teachers 01.09.2021
Subjects
Energy Conservation
Introductory Courses
Laboratory Equipment
Laboratory Training
Measurement Techniques
Motion
Science Laboratories
Scientific Principles
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Summary:While the three laws of conservation of energy, momentum, and angular momentum are all mentioned in introductory textbooks, there are few experiments through which students can investigate the conservation of angular momentum. Most experiments consist of collisions between rotating disks, in which one disk is dropped on another, or in which the rotational inertia of a single object is changed and the resulting change in angular velocity measured. This paper presents a method for studying collisions that centers on the conservation of angular momentum, and of rotational energy.
ISSN:0031-921X
DOI:10.1119/10.0006119