Two equal, positive charges, q=2.0µC are located on the x-axis, one at+0.3m and the other at -0.3m. A third charge Q=+4.0µC is located on the y-axis at +0.4m.
A) Find the magnitude and direction of the resultant (net) force on Q.
B) Find the value of the potential at the point (0.0,-0.4m).