Finding spring constant with electron on end

[briteliner]

Homework Statement

Calculate the spring constant of a spring with an electron mass at itsend and the frequency 4.9X10^14 Hz. mass of electron: 9.11X10^-31 g

Homework Equations

F=kx
k=mg/x

The Attempt at a Solution

Since i know the frequency, i can get the period, but where i am stuck is how to turn the period into an x value that i can use to determine the value of k. should i be using coulomb's law for this?

 

[Defennder]

It's funny how they used an electron instead of any mass, but since there's no consideration of any electrostatic forces, you can just ignore the electron charge. Just plug in the SHM formula for period/frequency with the given info to find the spring constant.