Interactive Visuals (EJSS) by Dr Michael R. Gallis
Beachball Physics

Beachball trajectories with different spin axes

Simple Bungee Jump

Bungee Jump Model with Ideal Elasticity

"Advanced" Bungee Jump

Bungee Jump Model with Energy Loss and Elastic Hystersis

Direction Field Explorer

Simple tool for visually exploring the implications of the direction field for several example first order differential equations.

Amusement Park Elevator Ride Simulation

Edit the ride experience and see the g's!

Simple Pulley/Counterweight Simulation

Adjust counterweight, pulley inertia and pulley radius and observe the dynamics

VR/Gaming Physics

Exlore collisions and forces in a simple VR/game physics simulation

Circular Motion Ride

Adjust counterweight, pulley inertia and pulley radius and observe the dynamics

Torque and Rotation

Torque from a force and moment arm, applied to a disk with rotational inertia




3 Axis Ride (under development)

Crazy motion (and g-forces) arise with 3 axis rotation rides!




Vertical Circular Motion Ride

Explore g-forces in ferris-wheel type rides

Adding Sine Waves

Change relative amplitude, phase and wavelength to explore interference of harmonic waves.

Pirate Ship Ride

Explore g forces, oscillations, work and energy in this perenial amusement park ride.

Differential Absorption

Compare how much X-rays get through two slabs of material of the same thickness by changing material properties (density, effective atomic number) and X-Ray source properties (energy, exposure(mAs)).

Spectrum of Diagnostic X-Rays

Control the spectrum of a diagnostic X-Ray source by changing energy (kVp), adding filtration to the X-Ray beam, and including ripple in the high voltage supply.

X-Ray Imaging

Explore X-Ray imaging. X-Ray control parameters include kVp (max photon energy), mAs (exposure) SID (distance to image receptor), added filtration, and ripple. The sample consists of two cylinders (identical size) embedded in a slab where the materials and sizes can be slected.

Preditor Prey Population Dynamics

The Lotka–Volterra Predator prey model describes the population dynamics of a group of predators and their prey.

Spherical Pendulum with Drag (under development)

This model can be thought of a a tetherball where the rope does not wrap up around the pole. The simulation is used for a mechanics lab activity (video analysis) involving a softball swinging around the top of a 2 meter vertical pole with between 1 and 2.5 m of string.