Algodoo

Wow, this was a difficult one to figure out! I spent a couple of hours on it trying different things, and I think I figured out what's happening.

Apparently, if any object that is glued to the background (such as those yellow bars) happens to get its velocity changed from zero to some value (not a normal thing to do), then ALL other objects that are glued to the background also get their velocity[x,y] set to the same value! That includes the plane, which just happens to be at some weird angle in your scene. When any non-glued object falls against a glued object (such as the plane) the non-glued object will get propelled in the direction and speed of the glued object's velocity value!

This is a bug which cannot be fixed at this time, but I will report it to Algoryx so they can decide what, if anything, they will do about it. For now, just make sure that any object which is glued to the background does not get it's velocity values [x or y] changed. I soon plan on uploading a demonstration scene which shows examples of this bug.

Thanks for bringing this to our attention.

oh np

bro i think i will explain..?

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do u even phisycs???????

what is happening to these circles?