A Geo Sphere Contact generates a force between a geometry and the other sphere. The geometry can be a rigid body or a flexible body and they can have any kind of shapes. This is a derived concept for Geo Surface contact and it is possible to switch to Geo Surface contact. In the case of action sphere geometry, it can be analyzed more quickly and accurately than Geo Surface contact.
Figure 1 GeoSph icon of the Contact group in the Professional tab