About
Free Fall 3D
The Free Fall 3D model simulates the same physics as the 2D Free Fall model but with a 3D View of the model's data. The ball falls with constant acceleration g=-9.8 m/s2 in the z direction. Click-dragging on the ball changes its height but leaves its velocity unchanged. The reset button stops the animation and sets the initial conditions to y=1.8 and vy=0.
The Free Fall 3D model is a designed to teach EJS modeling. Right click within the simulation to examine this model in the EJS modeling and authoring tool.
References:
- "Modeling Physics with Easy Java Simulations" by Wolfgang Christian and Francisco Esquembre, The Physics Teacher, November 2007, 45 (8), pp. 475-480.
- The Easy Java Simulations (EJS) documentation can be downloaded from the ComPADRE Open Source Physics collection. W. Christian and F. Esquembre, in Modeling Science: From Free Fall to Chaos (2008), WWW Document, (http://www.compadre.org/osp/items/detail.cfm?ID=7306).
- A video tutorial that will help you get started using Easy Java Simulations to create computer simulations. See: L. Engelhardt, Introduction to EJS Video Tutorial (2010), WWW Document, (http://www.compadre.org/OSP/items/detail.cfm?ID=10316).
Credits:
The Free Fall 3D model was created by Wolfgang Christian using version 4.3 of the Easy Java Simulations (EJS) authoring and modeling tool. You can examine and modify a compiled EJS model if you run the program by double clicking on the model's jar file. Right-click within the running program and select "Open EJS Model" from the pop-up menu to copy the model's XML description into EJS. You must, of course, have EJS installed on your computer.
Information about EJS is available at: <http://www.um.es/fem/Ejs/> and in the OSP ComPADRE collection <http://www.compadre.org/OSP/>.
3D Navigation
The model's 3D view has many built in features that can be accessed as the program is running.
- Left-button click-dragging on the particle changes its position.
- Left-button click-dragging on an empty regions rotates the view.
- Left-button shift-click-dragging zooms in and out.
- Left-button control-click-dragging translates (pans) the view.
- Left-button alt-click-dragging displays a 3D cursor on the scene (if the panel is Enabled).
It the x, y or z key is pressed during a mouse action, the actions affects only this coordinate. Note also that these actions are are modified if the 3D view is projected onto a 2D plane.
Right-clicking within a 3D view displays a popup menu as shown below.
Translations
Code | Language | Translator | Run | |
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Credits
Wolfgang Christian; Loo Kang Wee; Francisco Esquembre
Sample Learning Goals
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For Teachers
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Research
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Video
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Version:
Other Resources
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- Details
- Written by Wei Chiong
- Parent Category: 03 Motion & Forces
- Category: 01 Kinematics
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