Fully supported on Windows 10 and 11. It must be installed locally and does run in a web browser.
For historical curiosity, versions from the mid-90s (like v2.0 or v3.0) are hosted on the Internet Archive . interactive physics 1989 updated download
In 1989, running a rigid body dynamics solver on a home computer felt like magic. It was the first time a student could drop a ball on a see-saw, watch a catapult launch, and instantly see the vector arrows change length. Fully supported on Windows 10 and 11
If you are specifically looking for the classic interface for educational or retro-computing purposes, you generally want to search for rather than 1989. watch a catapult launch