A foggoid particle has dual energy. On the one hand where the spacetime or the motion of a foggoid particle in itself is concerned, its energy is the energy of its gfm ball particle (please see Section 6.2 of Chapter 6 of the Antigravitation Engine Site), e.g. En in Chapter 4 of the site. On the other hand where the action of a foggoid particle on an ordinary particle is concerned, the energy of the foggoid particle is computed by the traditional method. Its kinetic energy, for example, is Ek = (1/2)mv2 , where v is the relative velocity. Based on the nature of "whole or none" of antigravitation, a foggoid particle can give energy, if possible, to an ordinary particle through the coulomb force. For more information, please see the Antigravitation Engine Site (http://xczhx.nease.net/indexEnglish.htm).