Title

Demonstration of Energy Dissipation in a Spring-Mass System Undergoing Free Oscillations in Air

Document Type

Article

Publication Date

2009

Publication Source

World Transactions on Engineering and Technology Education

Volume

7

Issue

1

Inclusive pages

28-33

Publisher

UNESCO * International Centre for Engineering Education

Place of Publication

Australia

ISBN/ISSN

14462257

Peer Reviewed

yes

Abstract

In this article, an experimental method that uses logarithmic decrements to demonstrate energy dissipation in a spring-mass system that is oscillating in a medium with friction is presented. Such a method can be used to calculate, as a function of time, the amount by which frictional forces dissipate the kinetic energy of the oscillating mass. This information is useful in determining whether the applied force of damping is nonlinear or linear, whether or not it changes from the former to the latter during motion, and when such a change occurs. The method is explained and illustrated by using three spring-mass systems that oscillate in air with circular frequencies that vary between 9 and 25 rad/s.

Disciplines

Engineering

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