Did you click the link? https://gracefulliberty.com/physics/ https://gracefulliberty.com/physics/ They are making little web applets demonstrating the physics

Did you click the link? https://gracefulliberty.com/physics/ https://gracefulliberty.com/physics/ They are making little web applets demonstrating the physics concepts. You obviously can't do this in pure R6RS/etc., you need to pick some implementation that either has JS/WASM FFI or something built in. Likewise if they were doing this as a desktop application, etc. Pure Scheme can model the physics and return the correct numbers, but you need something more for graphics and interactivity.