Algodoo

I cut the circle no problem. What is supposed to happen?

The invisible ground.

Invisible ground??? What does that have to do with a cut circle swinging on ropes?

By the way, you made no mention in the scene about HOW to cut the circle! It was only after I poked around the scene and discovered that the Enter key activates the cutting laser.

Suggestion for you on your future scenes, make sure to include instructions, especially if users are expected to press certain keys or make certain actions with the mouse.

Oh. I didn't know that!

Here is a suggestion you might like. Instead of starting the scene with the laser pointing down at the circle, place the laser at one side so that when it gets activated it will cut both ropes at the same time.

Cool.