Department of Physics and Astronomy
University of Toledo
Toledo, Ohio 43606
Copyright © 1997 by Bo Gao. All rights reserved.
Human knowledge is mostly a collection of concepts and definitions. Laws and principles are important, but there are only very few of them. Many formulae that you encounter are simply definitions or some trivial statements based on them. There is no need to memorize definitions if you understand the concepts. For example,
displacement = velocity * time
is not something to be memorized. It is a definition of velocity that needs to be understood.
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