The Ball on a Moving Ring mobile JavaScript Model illustrates the forces and dynamics of a ball rolling to a circular track. This simulation uses the accelerometer on your mobile device to read the proper acceleration as measure by the mobile device. A force body (free body) diagram showing the force of the track (blue), the gravitational force (black), and the force of friction (green) can also be displayed. Users set the initial angle in radians and angular velocity in radians/second and you can adjust the viscous damping (friction) coefficient when the simulation is paused.
The Ball on a Moving Ring mobile JavaScript Model was developed using version 5 of the Easy Java Simulations (EJS 5) modeling tool. Although EJS is a Java program, EJS 5 can be used to create stand-alone JavaScript programs that run in almost any browser.
9-12: 4F/H1. The change in motion (direction or speed) of an object is proportional to the applied force and inversely proportional to the mass.
4G. Forces of Nature
6-8: 4G/M1. Every object exerts gravitational force on every other object. The force depends on how much mass the objects have and on how far apart they are. The force is hard to detect unless at least one of the objects has a lot of mass.
11. Common Themes
11B. Models
6-8: 11B/M2. Mathematical models can be displayed on a computer and then modified to see what happens.
AAAS Benchmark Alignments (1993 Version)
4. THE PHYSICAL SETTING
E. Energy Transformations
4E (9-12) #1. Whenever the amount of energy in one place or form diminishes, the amount in other places or forms increases by the same amount.
F. Motion
4F (6-8) #3. An unbalanced force acting on an object changes its speed or direction of motion, or both. If the force acts toward a single center, the object's path may curve into an orbit around the center.
W. Christian, Computer Program BALL ON A MOVING RING JS MODEL, Version 1.0 (2016), WWW Document, (https://www.compadre.org/Repository/document/ServeFile.cfm?ID=14161&DocID=4526).
W. Christian, Computer Program BALL ON A MOVING RING JS MODEL, Version 1.0 (2016), <https://www.compadre.org/Repository/document/ServeFile.cfm?ID=14161&DocID=4526>.
Christian, W. (2016). Ball on a Moving Ring JS Model (Version 1.0) [Computer software]. Retrieved October 10, 2024, from https://www.compadre.org/Repository/document/ServeFile.cfm?ID=14161&DocID=4526
Christian, Wolfgang. "Ball on a Moving Ring JS Model." Version 1.0. https://www.compadre.org/Repository/document/ServeFile.cfm?ID=14161&DocID=4526 (accessed 10 October 2024).
%A Wolfgang Christian %T Ball on a Moving Ring JS Model %D October 20, 2016 %U https://www.compadre.org/Repository/document/ServeFile.cfm?ID=14161&DocID=4526 %O 1.0 %O text/html
%0 Computer Program %A Christian, Wolfgang %D October 20, 2016 %T Ball on a Moving Ring JS Model %7 1.0 %8 October 20, 2016 %U https://www.compadre.org/Repository/document/ServeFile.cfm?ID=14161&DocID=4526
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