The Physics Source website will be unavailable Friday evening through Saturday afternoon as electrical work occurs in the American Center of Physics server room. Down time will begin at 6PM Eastern Time on Friday. Service is expected to resume by 6PM on Saturday, July 30.

Ejs Spinning Dumbbell Model Documents

This material has 2 associated documents. Select a document title to view a document's information.

Main Document

Ejs Spinning Dumbbell Model 

written by Juan Aguirregabiria
edited by Wolfgang Christian

The Ejs Spinning Dumbbell model displays the motion of a dumbbell spinning around the fixed vertical axis z with constant angular velocity.  The trajectories of each mass as well as the system's angular velocity, angular momentum and applied toque can be shown.  The angle between the rod and the vertical, and the angular speed can be changed via textboxes.  You can modify this simulation if you have Ejs installed by right-clicking within the plot and selecting "Open Ejs Model" from the pop-up menu item.  

Ejs Spinning Dumbbell model was created using the Easy Java Simulations (Ejs) modeling tool.  It is distributed as a ready-to-run (compiled) Java archive.  Double clicking the ejs_ehu_rigid_bodies_dumbbell.jar file will run the program if Java is installed.  Ejs is a part of the Open Source Physics Project and is designed to make it easier to access, modify, and generate computer models.  Additional Ejs models for rigid body dynamics are available.  They can be found by searching ComPADRE for Open Source Physics, OSP, or Ejs.

Last Modified June 19, 2013

This file has previous versions.

Source Code Documents

Ejs Spinning Dumbbell Model Source Code 

The source code zip archive contains an XML representation of the Ejs Spinning Dumbbell Model.  Unzip this archive in your Ejs workspace to compile and run this model using Ejs.

Published September 29, 2008
Last Modified September 6, 2011

This file has previous versions.