Algodoo

The black objects have negative air friction and therefore constantly accelerate.
The white objects have positive air friction and therefore constantly decelerate.

The outer objects have 100x the normal air friction (-/+).
The inner objects have 1000x the normal air friction (-/+).

You should phunlet these items and find ways to make use of their special properties.

You cannot make items have these properties in the game unless you edit the scene in notepad. Therefore it would be wise to phunlet the items unless you know how to edit scenes in notepad.