Zero gravity momentum

Hi,

I am making a 2D game where an 'unconscious' astronaut (2D ragdoll) can be pushed around in space by objects moved around with the mouse. I really want the astronaut to conserve some momentum from collision from the mouse controlled object when he is hit by it. As it is now, the object can push the ragdoll but the object does not continue to float in the direction pushed, as it would be in zero gravity. I am not sure how to do this in Unity. I have set gravity to 0 in the editor.

Here is a picture of the ragdoll and the 'pushing' object:

http://puu.sh/kCOry/95215de37b.png

Thanks!

 

Your drag needs to be 0 as well.

 

I have set angular and linear drag to 0 for all rigidbodies of the ragdoll.