Consider the following load distribution: "A thin disk of radius R has a charge Q evenly distributed over its entire area." Using Coulomb's Law to find the electric field associated with this charge...

Consider the following load distribution:
"A thin disk of radius R has a charge Q evenly distributed over its entire area."
Using Coulomb's Law to find the electric field associated with this charge distribution, "at points on the disk axis";

b) Assuming that there is a small hole in the center of the disk through which the electron can pass, describe its movement when it is abandoned at a point very close to the plane where the disk is located.