A pendulum is a weight suspended from a pivot so that it can swing freely. When released, the restoring force acting on the pendulum's mass causes it to oscillate about the equilibrium position, swinging back and forth. The time for one complete cycle, a left swing and a right swing, is called the period. The period depends on the length of the pendulum and also to a slight degree on the amplitude , the width of the pendulum's swing.
Experiment of The Month
 Dynamics of heavy and buoyant underwater pendulums
Senior physics major Robert Lee has a first; a second entry in the Experiment of the Month. For his senior seminar project as well as his University Honors Thesis and his Physics Department Honors project , he studied a pendulum swinging under water. In particular, he compared the period of a pendulum swinging under water to the period of the same pendulum swinging in air. His pendulum had a spherical brass bob on the end of a light thread. He made measurements for thread lengths of Textbook treatments of the pendulum might lead one to expect that the period was lengthened because of the "damping force" due to the viscosity of the water.
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Skip to Main Content. A not-for-profit organization, IEEE is the world's largest technical professional organization dedicated to advancing technology for the benefit of humanity. Use of this web site signifies your agreement to the terms and conditions. Design and Implementation of an Active Pendulum Control System for Fluid Damping Measurement Abstract: While a pendulum swings freely in fluid, the number of swings reflects the effect of fluid damping. Swinging during a fixed period as a gravity pendulum of a certain weight, the swing of the pendulum decays faster if the damping is larger, and more slowly if the damping is smaller .
Eisha Mason and Hector Aristizabal : ImaginAction in Afghanistan. A ticket to equality for Afghan women. Theodore Roszak Sunday, November 9, 2003. The women are still getting kicked around.