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Ejs Intro SpringLab Model
written by Anne Cox, Wolfgang Christian, and Mario Belloni
supported by the National Science Foundation
The Introductory Spring Lab model asks students to develop a model for a mass on a spring. It is distributed as a ready-to-run (compiled) Java archive.  Double-clicking the ejs_intro_SpringLab.jar file will run the program if Java is installed. In order to modify this simulation (and see how it is designed), if you have Ejs installed, 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: .
The Intro Spring Lab program is one of a suite of Easy Java Simulations (Ejs) models used in Introductory Physics Labs. Ejs, a part of the Open Source Physics Project, and 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.
3 supplemental documents are available
1 source code document is available
Subjects Levels Resource Types
Classical Mechanics
- Newton's Second Law
= Force, Acceleration
Oscillations & Waves
- Oscillations
= Simple Harmonic Motion
= Springs and Oscillators
- High School
- Lower Undergraduate
- Instructional Material
= Activity
= Interactive Simulation
= Laboratory
Intended Users Formats Ratings
- Learners
- Educators
- application/java
  • Currently 0.0/5

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Safety Warnings
Minimal Danger   No Safety Equipment Necessary  

Access Rights:
Free access
© 2008 Wolfgang Christian
Additional information is available.
EJS, Easy Java Simulations, computational modeling, computer modeling, conservation of energy, elastic potential energy, gravitational potential energy, osp, spring, spring constant
Record Creator:
Metadata instance created May 28, 2008 by Anne Cox
Record Updated:
June 5, 2014 by Andreu Glasmann
Last Update
when Cataloged:
May 28, 2008
Other Collections:

AAAS Benchmark Alignments (2008 Version)

4. The Physical Setting

4F. Motion
  • 9-12: 4F/H4. Whenever one thing exerts a force on another, an equal amount of force is exerted back on it.

11. Common Themes

11B. Models
  • 6-8: 11B/M2. Mathematical models can be displayed on a computer and then modified to see what happens.
  • 9-12: 11B/H3. The usefulness of a model can be tested by comparing its predictions to actual observations in the real world. But a close match does not necessarily mean that other models would not work equally well or better.
ComPADRE is beta testing Citation Styles!

Record Link
AIP Format
A. Cox, W. Christian, and M. Belloni, Computer Program EJS INTRO SPRINGLAB MODEL (2008), WWW Document, (
A. Cox, W. Christian, and M. Belloni, Computer Program EJS INTRO SPRINGLAB MODEL (2008), <>.
APA Format
Cox, A., Christian, W., & Belloni, M. (2008). Ejs Intro SpringLab Model [Computer software]. Retrieved June 26, 2017, from
Chicago Format
Cox, A, W. Christian, and M. Belloni. "Ejs Intro SpringLab Model." (accessed 26 June 2017).
MLA Format
Cox, Anne, Wolfgang Christian, and Mario Belloni. Ejs Intro SpringLab Model. Computer software. 2008. Java 1.5. 26 June 2017 <>.
BibTeX Export Format
@misc{ Author = "Anne Cox and Wolfgang Christian and Mario Belloni", Title = {Ejs Intro SpringLab Model}, Month = {May}, Year = {2008} }
Refer Export Format

%A Anne Cox
%A Wolfgang Christian
%A Mario Belloni
%T Ejs Intro SpringLab Model
%D May 28, 2008
%O application/java

EndNote Export Format

%0 Computer Program
%A Cox, Anne
%A Christian, Wolfgang
%A Belloni, Mario
%D May 28, 2008
%T Ejs Intro SpringLab Model
%8 May 28, 2008

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.

Citation Source Information

The AIP Style presented is based on information from the AIP Style Manual.

The APA Style presented is based on information from APA Electronic References.

The Chicago Style presented is based on information from Examples of Chicago-Style Documentation.

The MLA Style presented is based on information from the MLA FAQ.

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Ejs Intro SpringLab Model:

Requires Easy Java Simulations Modeling and Authoring Tool

The Ejs tool is needed to modify the simulation and complete the activity.

relation by Anne Cox
Is Based On Easy Java Simulations Modeling and Authoring Tool

The Easy Java Simulations Modeling and Authoring Tool is needed to explore the computational model used in the Intro SpringLab resource.

relation by Caroline Hall

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