found http://www.compadre.org/OSP/items/detail.cfm?ID=7299&S=7

Ejs Intro 2DMotionLab Model[img]http://www.compadre.org/profiles/2Dmotion.jpg[/img]
written by Anne Cox, Wolfgang Christian, and Mario Belloni
The Introductory Physics 2D (Projectile) Motion Lab program asks students to develop a model for a ball with projectile motion. It is distributed as a ready-to-run (compiled) Java archive.  Double-clicking the ejs_intro_2DMotionLab.jar file will run the program if Java is installed. In order to modify this simulation (and see how it is designed), if you have Ejs installed, you can right-click within the simulation window and select Open Ejs Model from the pop-up menu. Information about Ejs (Easy Java Simulations) is available at: http://www.um.es/fem/Ejs/.

This Ejs Intro 2DMotionLab Model simulation is a template for students to input their own equations to model the physics of Ejs Intro 2DMotionLab Model.
I like it 2 :)

http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=623.0
Projectile motion with equations by Fu-Kwun Hwang
Like! equations, input fields, autoscale codes for the view