converting g changes to angular velocity
Using RCF = 1.118 x Radius x (rpm/1000)\$^2\$ you can convert between g force (relative centrifugal force) and RPM for a certain "off-centre" distance (in millimetres): -



Or use this calculator or the following table: -



Once you have obtained RPM you can calculate the speed of rotation at that radius (angular velocity).

It's not a very electronicky subject on the face of it but I've used it for determining if some crystals can be used when rotated.