Like other Maya effects, Nucleus objects can be manipulated by external dynamic forces. Dynamic animation or simulation uses the rules of physics to generate the motion of these dynamic forces. You can use fields (FX menu set > Fields menu) to create different types of external dynamic forces for your Nucleus objects. You can also use the Dynamic Relationships Editor to view and change the connections between Nucleus objects and Maya fields. See Dynamic Relationships Editor and Connect and disconnect fields, emitters, and collision objects.
Fields are forces that you can use to dynamically affect the motion of Nucleus objects to create realistic motion that’s hard to achieve with traditional keyframe animation. You can create a field on Nucleus object as a standalone force or a volume. See Maya Fields