Electron Suspended Between the Surface of The Earth

[PepeF.]

Homework Statement

An Electron remains suspended between the Earth (assumed nueutral) and a fixed positive point charge, at a distance of 6.37 m from the point charge.
Determine the charge for this to happen.
answer must be in C.

Homework Equations

g= 9.8 m/s^2
Coulomb constant = 8/98755e9 N* m^2/C^2
Kc= 8.99e9
Fe= Kc (q1*q2)/r^2

The Attempt at a Solution

I am confused with this question,. please help me out

 

[1Kris]

What's the question asking for?

 

[PepeF.]

What's the question asking for?

it says

determine the charge for this to happen

 

[1Kris]

Well think in terms of force of the condition that causes this equilibrium. Write down the equation for the two forces involved and the rest is just simple algebra (then a calculation when you stick the numbers in).