A magnetic field has a magnitude of 1.2*10^-3 T, and an electric field has a magnitude of 5.4*10^3 N/C. Both fields point in the same direction. A positive 1.8*10^-6 C charge moves at a speed of 3.6*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. I know Force produced by electric field is F=qE I know Force produced by magnetic field is F=Bqv How do i do this problem?? thanks.