The Lagrangian Pendulum Spring model asks students to solve the Lagrangian for a spring-pendulum and then develop a computational model of it. The model framework is distributed as a ready-to-run (compiled) Java archive. Double-clicking the ejs_CM_Lagrangian_pendulum_spring.jar file will run the program if Java is installed. In order to run correctly, the student must add the correct physics to the EJS differential equation solver and parameter definitions. If EJS is installed on your computer, you can right-click within the simulation window and select Open Ejs Model from the pop-up menu. Information about Ejs (Easy Java Simulations) is available at: http://www.um.es/fem/Ejs/.

The CM Lagrangian Pendulum Spring model is one of several Easy Java Simulations (Ejs) models used to incorporate computational physics in Classical Mechanics. Ejs, a part of the Open Source Physics Project, is designed to make it easier to access, modify and generate computer models. Additional models can be found by searching ComPADRE for Ejs.

Please note that this resource requires
at least version 1.5 of
Java (JRE).

Ejs CM Lagrangian Pendulum Spring Documentation
A pdf document that briefly describes the CM Lagrangian Pendulum Spring model. It describes how to use the ejs_CM_lagrangian_pendulum_spring.jar file with Ejs and contains an exercise and instructor notes. download 42kb .pdf
Published: June 3, 2008

Ejs CM Lagrangian Pendulum Spring Distribution
The materials distributed in this directory are in support of the Classical Mechanics (CM) Lagrangian Pendulum Spring model. This distribution contains the CM Lagrangian Pendulum Spring model, documentation with instructor notes, and a data set for use with the model (but not Ejs itself). download 1195kb .zip
Published: June 3, 2008
previous versions

Ejs CM Lagrangian Pendulum Spring Model Source
The source code zip archive contains an XML representation of the Lagrangian Pendulum Spring model. Unzip this archive in your EJS workspace to compile and run this model using EJS. download 10kb .zip
Published: October 2, 2008

A. Cox, Computer Program EJS CM LAGRANGIAN PENDULUM SPRING MODEL (2008), WWW Document, (http://www.compadre.org/Repository/document/ServeFile.cfm?ID=7357&DocID=508).

A. Cox, Computer Program EJS CM LAGRANGIAN PENDULUM SPRING MODEL (2008), <http://www.compadre.org/Repository/document/ServeFile.cfm?ID=7357&DocID=508>.

Cox, A. (2008). Ejs CM Lagrangian Pendulum Spring Model [Computer software]. Retrieved May 3, 2016, from http://www.compadre.org/Repository/document/ServeFile.cfm?ID=7357&DocID=508

Cox, Anne. "Ejs CM Lagrangian Pendulum Spring Model." http://www.compadre.org/Repository/document/ServeFile.cfm?ID=7357&DocID=508 (accessed 3 May 2016).

%A Anne Cox %T Ejs CM Lagrangian Pendulum Spring Model %D June 3, 2008 %U http://www.compadre.org/Repository/document/ServeFile.cfm?ID=7357&DocID=508 %O application/java

%0 Computer Program %A Cox, Anne %D June 3, 2008 %T Ejs CM Lagrangian Pendulum Spring Model %8 June 3, 2008 %U http://www.compadre.org/Repository/document/ServeFile.cfm?ID=7357&DocID=508

Disclaimer: ComPADRE offers citation styles as a guide only. We cannot offer interpretations about citations as this is an automated procedure. Please refer to the style manuals in the Citation Source Information area for clarifications.