1. The problem statement, all variables and given/known data The motion of a charged particle P, observed in an inertial frame S. It is found that P moves with constant velocity v through a region of space where there is a uniform electric field E and a uniform magnetic field B. The speed v = |v|and the field magnitudes E = |E| and B = |B| are all non-vanishing. Show that v.E =0. Show that E.B =0. Show that v ≥ E/B. dont know how to start this.Need help.