A uniform magnetic field of magnitude 0.80 T in the negative…

A uniform magnetic field of magnitude 0.80 T in the negative z-direction is present in a region of space. A uniform electric field is also present. In the figure, the electric field is set at 27,200 V/m in the positive y-direction. An electron is projected with an initial velocity vo = 3.4 x 104 m/s  in the positive x-direction. The y-component of the initial force on the electron is closest to:

Two identically charged balls are a certain distance apart….

Two identically charged balls are a certain distance apart. The vectors in the diagram below show the magnitude and direction of the electrostatic force on each ball. Suppose the charge on the left ball is now doubled (represented by two plus signs). Which diagram below best represents the forces that now act on the two balls?