Horizontal Mass and Spring
Simple horizontal SHO simulation for in-class discussion.
ready-to-run  -  details
Simple Vertical SHO Simulation
Simple simulation without narrative for classroom discussion.
ready-to-run  -  details
Molecular Dynamics with Mobile Device Gravity Sensor
Run this simulation and tilt your mobile device.  The atoms will fall if the "g" parameter is not zero.
ready-to-run  -  details