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written by Michael R. Gallis
The Pirate Ship JavaScript Model is a JavaScript implementation of the Java version of the same model.  These simulations were inspired by the Pirate Ride at Hershey Park. The "ship" part of the ride has a center of mass that lies 14 m from the pivot point (approximately the center of the boat). The ship swings freely from the pivot, and is driven by a roller built into the floor directly below the ship. The operator presses either the clockwise torque button or the counter clockwise torque button to change the motion of the ship. Because the drive can only push the ship when it is in contact, the drive is only available when the ship is within 30ยบ of its lowest position. The drive buttons are grey when no drive is available (simulation is paused or the ship does not contact the drive roller), the turn white when the drive is available. When drive button is pressed, it turns green and a constant torque is exerted on the ship until the button is released or until the ship moves out of contact with the drive roller. Note that torque can not be applied if the simulation is paused or has not been started.

The Pirate Ship JavaScript Model was developed using the Easy Java Simulations (EjsS) version 5.  It is distributed as a ready-to-run html page and requires only a browser with JavaScript support.
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View the source code document attached to this resource
  • Pirate Ship JS Source Code
    This source code zip archive contains an XML representation of the Pirate Ship JS Model.   Unzip this archive in your Ejs workspace to compile and run this model using EjsS 5.  Although EjsS is a Java program, EJ=jsS 5 creates a stand-alone JavaScript program from this source code.
Subjects Levels Resource Types
General Physics
- Computational Physics
Motion, Forces, and Energy
- General
- Motion in One Dimension
- Work and Energy
= Conservation of Energy
Waves and Pendula
- Oscillations
= Driven Mechanical Resonance
= Pendula
= Physical Pendula
- Lower Undergraduate
- Middle School
- High School
- Instructional Material
= Interactive Simulation
= Simulation
Intended Users Formats Ratings
- Learners
- Educators
- application/javascript
- text/html
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Access Rights: Free access
License: This material is released under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 license.
Rights Holder: Michael Gallis
Keyword: amusement park
Record Cloner: Metadata instance created April 22, 2014 by Wolfgang Christian
Record Updated: Jul 13, 2023 by Bruce Mason
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AIP Format
M. Gallis, Computer Program PIRATE SHIP JS MODEL (2014), WWW Document, (
M. Gallis, Computer Program PIRATE SHIP JS MODEL (2014), <>.
APA Format
Gallis, M. (2014). Pirate Ship JS Model [Computer software]. Retrieved May 21, 2024, from
Chicago Format
Gallis, Michael. "Pirate Ship JS Model." (accessed 21 May 2024).
MLA Format
Gallis, Michael. Pirate Ship JS Model. Computer software. 2014. 21 May 2024 <>.
BibTeX Export Format
@misc{ Author = "Michael Gallis", Title = {Pirate Ship JS Model}, Year = {2014} }
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%A Michael Gallis %T Pirate Ship JS Model %D 2014 %U %O application/javascript

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%0 Computer Program %A Gallis, Michael %D 2014 %T Pirate Ship JS Model %U

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Pirate Ship JS Model:

Is Based On Easy Java Simulations Modeling and Authoring Tool

Use the Easy Java Simulations Modeling and Authoring Tool to edit and to explore the source code for the Pirate Ship JS Model.

relation by Lyle Barbato

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