Offsetting RBD for fractured object ;

I own a 100 spheres copied across a plane. I want to be able to make them drop starting from the center outwards. So far I have tried to get the distance of each ball ⠀from the origin and then compare that to the $F such that when $F>=distance, an “active” attribute becomes 1. However, this doesn’t seem to work in my dopnet. I have also looked into the active value node but haven’t been able to work this out either. Is it possible to bring a group from outside of the dopnet into the active value node(seems to only allow groups based on name attribute)? Any suggestions? Thanks