So how does connection mode apply to linear & angular velocity when trying to move a group of objects? I don't find it intuitive at all... 1) In the capture, the bar (a platform) has to move between two points. The triangles are enemies. If I apply linear velocity I can get the bar to move back and forth without a problem, but attaching the two triangles to its center makes it stationary. 2) I have a similar problem with angular rotation. Angular rotation on the bar only makes it spin, but connecting anything makes it stop working. Triangles are enemies of fixed type. Sorry for the rookie questions, thanks!