Speed of an Electron in an Electric Field

[zahraa]

Homework Statement

Two stationary positive point charges, charge 1 of magnitude 3.90 and charge 2 of magnitude 1.90 , are separated by a distance of 41.0 . An electron is released from rest at the point midway between the two charges, and it moves along the line connecting the two charges.

Homework Equations

What is the speed of the electron when it is 10.0 from charge 1?

The Attempt at a Solution

 

[kuruman]

What do you think? What equations are relevant here?