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Computer Program Detail Page

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written by Wolfgang Christian
The Ejs Free Fall Polar model displays the dynamics in polar coordinates of a ball launched near the surface of Earth onto a platform.  The initial conditions for the ball are a negative initial velocity in the radial direction and a positive initial velocity in the theta direction (or positive initial velocities in both the x and y directions).  The coefficient of restitution for the ball's collision with the platform is less than one.  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 Free Fall Polar 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_newton_FreeFallPolar.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 Newtonian mechanics are available.  They can be found by searching ComPADRE for Open Source Physics, OSP, or Ejs.

Please note that this resource requires at least version 1.5 of Java (JRE).
Subjects Levels Resource Types
Classical Mechanics
- Gravity
- Motion in Two Dimensions
= Projectile Motion
Mathematical Tools
- Coordinate Systems
- Upper Undergraduate
- High School
- Lower Undergraduate
- Instructional Material
= Activity
= Curriculum support
= Interactive Simulation
Intended Users Formats Ratings
- Learners
- Professional/Practitioners
- Educators
- application/java
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Access Rights:
Free access
Restriction:
© 2008 Wolfgang Christian
Additional information is available.
Keywords:
Easy Java Simulations, Ejs, OSP, Open Source Physics, free fall, gravity, polar coordinates, projectile motion
Record Creator:
Metadata instance created June 2, 2008 by Mario Belloni
Record Updated:
June 5, 2014 by Andreu Glasmann
Last Update
when Cataloged:
June 1, 2008
ComPADRE is beta testing Citation Styles!

Record Link
AIP Format
W. Christian, Computer Program EJS FREE FALL POLAR MODEL, Version 1.0 (2008), WWW Document, (http://www.compadre.org/Repository/document/ServeFile.cfm?ID=7348&DocID=500).
AJP/PRST-PER
W. Christian, Computer Program EJS FREE FALL POLAR MODEL, Version 1.0 (2008), <http://www.compadre.org/Repository/document/ServeFile.cfm?ID=7348&DocID=500>.
APA Format
Christian, W. (2008). Ejs Free Fall Polar Model (Version 1.0) [Computer software]. Retrieved August 27, 2014, from http://www.compadre.org/Repository/document/ServeFile.cfm?ID=7348&DocID=500
Chicago Format
Christian, Wolfgang. "Ejs Free Fall Polar Model." Version 1.0. http://www.compadre.org/Repository/document/ServeFile.cfm?ID=7348&DocID=500 (accessed 27 August 2014).
MLA Format
Christian, Wolfgang. Ejs Free Fall Polar Model. Vers. 1.0. Computer software. 2008. Java (JRE) 1.5. 27 Aug. 2014 <http://www.compadre.org/Repository/document/ServeFile.cfm?ID=7348&DocID=500>.
BibTeX Export Format
@misc{ Author = "Wolfgang Christian", Title = {Ejs Free Fall Polar Model}, Month = {June}, Year = {2008} }
Refer Export Format

%A Wolfgang Christian
%T Ejs Free Fall Polar Model
%D June 1, 2008
%U http://www.compadre.org/Repository/document/ServeFile.cfm?ID=7348&DocID=500
%O 1.0
%O application/java

EndNote Export Format

%0 Computer Program
%A Christian, Wolfgang
%D June 1, 2008
%T Ejs Free Fall Polar Model
%7 1.0
%8 June 1, 2008
%U http://www.compadre.org/Repository/document/ServeFile.cfm?ID=7348&DocID=500


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 Style.org: 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.

Ejs Free Fall Polar Model:

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 Ejs Free Fall Polar Model.

relation by Mario Belloni

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