Acceleration of an electron in a constant electric field

[gc33550]

Homework Statement

An electron, starting from rest, is accelerated by a uniform electric field of 4 104 N/C that extends over a distance of 7 cm. Find the speed of the electron after it leaves the region of uniform electric field.

Homework Equations

F=(q₁q₂)/r^2
and maybe the Work equation

The Attempt at a Solution

I really have no idea if i could get an idea of how to start it i may be able to think through it. I don't want an answer just a little guidance please

 

[Hootenanny]

The work-energy theorem is the way to go ...

 

[noblegas]

2. Homework Equations
F=(q1q2)/r^2
and maybe the Work equation

Your force equation is incorrect; You are missing a constant

 

[rl.bhat]

Homework Statement

An electron, starting from rest, is accelerated by a uniform electric field of 4 104 N/C that extends over a distance of 7 cm. Find the speed of the electron after it leaves the region of uniform electric field.

Homework Equations

F=(q₁q₂)/r^2
and maybe the Work equation

What is the force experienced by an electron in an electric field?
What is the work done on the electron by the electric field?