ERIC Number: EJ1079173
Record Type: Journal
Publication Date: 2015-Nov
Abstractor: As Provided
Reference Count: 6
Moment of Inertia by Differentiation
Rizcallah, Joseph A.
Physics Teacher, v53 n8 p482-484 Nov 2015
The calculation of the moment of inertia of an extended body, as presented in standard introductory-level textbooks, involves the evaluation of a definite integral--an operation often not fully mastered by beginners, let alone the conceptual difficulties it presents, even to the advanced student, in understanding and setting up the integral in the first place. We here use dimensional analysis along with elementary differentiation techniques to derive the moments of inertia of various extended bodies. The suggested method does not employ integrals and, in effect, is just a disguised application of elementary ordinary differential equations.
Descriptors: Science Instruction, Physics, Teaching Methods, Motion, Scientific Concepts, Equations (Mathematics), Computation
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Publication Type: Journal Articles; Reports - Descriptive
Education Level: N/A
Authoring Institution: N/A