A magnetic field has a magnitude of 1.2 x 10^-3 T and an electric field has a magnitude of 4.6 x 10^3 N/C. Both fields point in the same direction. A positive 1.8 -uC charge moves at a speed of 3.1 x 10^6 m/s in a direction that is perpendicular to both fields. Determine the magnitude of the net force that acts on the charge.