Computer Program Detail Page
written by Fu-Kwun Hwang and Wolfgang Christian
edited by Robert Mohr
This interactive simulation allows students to explore two-dimensional elastic collision between hard disks in an isolated system. The user can modify the mass, position and velocity of each disk using sliders. Both disks are draggable, allowing students to set up one-dimensional and two-dimensional collisions. A checkbox option will pause the simulation at the moment of collision, and then display arrows showing the momenta of each disk immediately before AND after the collision. Red arrows depict the change in momentum resulting from the collision. The instructions explain how to set up equations to calculate both the total energy and total momentum of the system after the collision.
See related materials for a link to a simpler Easy Java Simulation that models a one-dimensional collision.
See Annotations for an editor-recommended tutorial on momentum and its conservation.
This resource is distributed as a ready-to-run (compiled) Java archive. In order to modify the simulation (and see how it is designed), users must install the Easy Java Simulations Modeling and Authoring Tool. SEE RELATED MATERIALS for a link to install the EJS modeling tool.
Please note that this resource requires at least version 1.5 of Java (JRE).
View the source code document attached to this resource
AAAS Benchmark Alignments (2008 Version)
4. The Physical Setting
11. Common Themes
The Physics Classroom: Law of Momentum Conservation (Editor: Caroline Hall)
This chapter of The Physics Classroom tutorial has six sections that offer in-depth support in understanding momentum conservation, especially in isolated systems. Students will review the Law of Action-Reaction, explore both impulse and collision, and interactively practice using related equations for problem-solving. Many practical examples are given, alongside diagrams, drawings, and animations.\
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Two Particle Elastic Collision 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 Two Particle Elastic Collision Model.relation by Wolfgang Christian
Covers the Same Topic As One Dimensional Collision Model
This is a less advanced model of two objects colliding, in which the motion is confined to a single line.relation by Caroline Hall
Is a Teaching Guide For The Physics Classroom: Momentum Conservation Principle
Is a Teaching Guide For Physics Classroom: The Law of Action-Reaction (Revisited)
Is a Teaching Guide For Physics Classroom: Isolated Systems
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