There is an electric field 519N/C in the positive y direction and a magnetic field of 0.319 mT directed out of the screen. Directions and forces of these fields do not change .
what is magnitude and direction of the total force on the proton at point A ( 30km/s)?
what is the work done on the proton from moving it 0.631 m away ( to point B )?
what is the magnitude and direction of the total force on the proton at point B?