1. The problem statement, all variables and given/known data There are two force equations in this wiki page: http://en.wikipedia.org/wiki/Gravitoelectromagnetism 2. Relevant equations 3. The attempt at a solution The conventional Lorentz force is [tex]F = q(E + v \times B)[/tex] It says that the gravielectromagnetic force equation: [tex]F = m(E_g + v \times B_g)[/tex] Is it's gravitational analogue. Yet, the only difference between the equations is that mass and charge have been exchanged. How can the dimensions be right in the second equation? Thank you!