Propagate momentum on child objects

This is probably more of a physics question than anything, but i’ve been trying and trying and i still can’t figure it out.

I want to propagate momentum on child objects

When the parent objects moves or rotates (or both) i want to be able to add some force corresponding to the parents movements. So far i’ve been trying to add a force depending on the parents delta position and while it somehow works i can tell it a fake movement when i flick the parent object or make it spin

any ideas?

I don’t think parenting is the way to go there. You should use joints instead.