Demonstration of Energy Dissipation in a Spring-Mass System Undergoing Free Oscillations in Air
World Transactions on Engineering and Technology Education
UNESCO * International Centre for Engineering Education
Place of Publication
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.
Josué Njock Libii (2009).
Demonstration of Energy Dissipation in a Spring-Mass System Undergoing Free Oscillations in Air. World Transactions on Engineering and Technology Education.7 (1), 28-33. Australia: UNESCO * International Centre for Engineering Education.