what causes inertia, and where is inertial energy stored?  If it is related to a 3 dimensional particle, such as a boson, then why does the inertial g force subside after an object has reached a steady speed, after the initial accelerations?  If inertia is tied to a particle then there should be constant inertial resistance or g force even after the initial acceleration and an object has reached a steady speed.  If it is stored in a field, such as the higgs field, then by what mechanism?  There is not an increase of heat or electromagnetic energy, or the atomic state of a moving object, how is the energy stored?  Also, isn’t this related to gravity and isn’t gravity the result of the same mechanism as gravity?  I think so.

(Mark Burch posted this. I don’t know what to answer. However, visitors are invited to post your reactions)