APS Excellence in Physics Education Award
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Science SPORE Prize
November 2011

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The Open Source Physics Project is supported by NSF DUE-0442581.

Computer Program Detail Page

Item Picture
Swinging Atwood's Machine Model
written by Leah Ruckle
The Swinging Atwood's Machine Model is an extension of the traditional Atwood's machine where one hanging mass is allowed to swing like a pendulum. One assumes that all motions for the swinging mass are possible including positions above the second peg which requires that the string remains rigid at all times. Unlike the traditional Atwood's machine, orbits or cycles are possible. In other words, for certain conditions, the motion of the Atwood's machine can continue indefinitely. In changing the ratio of the two masses and the initial angle of displacement, the trajectory of the swinging mass changes.  The object of this simulation is to model that system and allow the user a large amount of control over initial conditions so that they may fully explore the system.

The Swinging Atwood's Machine 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_comp_phys_swinging_atwoods.jar file will run the program if Java is installed.

Please note that this resource requires at least version 1.5 of Java (JRE).
6 supplemental documents are available
1 source code document is available
Subjects Levels Resource Types
Classical Mechanics
- Newton's Second Law
= Interacting Objects
Modern Physics
- Chaos & Non-linear Dynamics
Oscillations & Waves
- Oscillations
= Coupled Oscillations
- Upper Undergraduate
- Lower Undergraduate
- Instructional Material
= Interactive Simulation
= Laboratory
= Simulation
Intended Users Formats Ratings
- Educators
- Learners
- application/java
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Access Rights:
Free access
This material is released under a GNU General Public License Version 3 license.
Rights Holder:
Leah Ruckle
Atwood, Atwood's machine, EJS, Easy Java Simulations, swinging
Record Creator:
Metadata instance created June 15, 2011 by Mario Belloni
Record Updated:
July 19, 2020 by Bruce Mason
Last Update
when Cataloged:
June 15, 2011
Other Collections:

ComPADRE is beta testing Citation Styles!

Record Link
AIP Format
L. Ruckle, Computer Program SWINGING ATWOOD'S MACHINE MODEL (2011), WWW Document, (https://www.compadre.org/Repository/document/ServeFile.cfm?ID=11247&DocID=2290).
L. Ruckle, Computer Program SWINGING ATWOOD'S MACHINE MODEL (2011), <https://www.compadre.org/Repository/document/ServeFile.cfm?ID=11247&DocID=2290>.
APA Format
Ruckle, L. (2011). Swinging Atwood's Machine Model [Computer software]. Retrieved July 24, 2024, from https://www.compadre.org/Repository/document/ServeFile.cfm?ID=11247&DocID=2290
Chicago Format
Ruckle, Leah. "Swinging Atwood's Machine Model." https://www.compadre.org/Repository/document/ServeFile.cfm?ID=11247&DocID=2290 (accessed 24 July 2024).
MLA Format
Ruckle, Leah. Swinging Atwood's Machine Model. Computer software. 2011. Java (JRE) 1.5. 24 July 2024 <https://www.compadre.org/Repository/document/ServeFile.cfm?ID=11247&DocID=2290>.
BibTeX Export Format
@misc{ Author = "Leah Ruckle", Title = {Swinging Atwood's Machine Model}, Month = {June}, Year = {2011} }
Refer Export Format

%A Leah Ruckle %T Swinging Atwood's Machine Model %D June 15, 2011 %U https://www.compadre.org/Repository/document/ServeFile.cfm?ID=11247&DocID=2290 %O application/java

EndNote Export Format

%0 Computer Program %A Ruckle, Leah %D June 15, 2011 %T Swinging Atwood's Machine Model %8 June 15, 2011 %U https://www.compadre.org/Repository/document/ServeFile.cfm?ID=11247&DocID=2290

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Swinging Atwood's Machine 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 Swinging Atwood's Machine Model.

relation by Mario Belloni

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