Electric field strength of 4 charges positioned in a square shape

[need_aca_help]

Homework Statement

Four charged particles are at the corners of a square of side a as shown in the figure below. (Let
A = 3, B = 5 and C = 6.)

(a) Determine the electric field at the location of charge q. (Use the following as necessary: q, a, and ke.)
(b) Determine the total electrostatic force exerted on q. (Use the following as necessary: q, a, and ke.)

Homework Equations

F=Eq

The Attempt at a Solution

Assuming that I have to solve this algebraically...

 

[Simon Bridge]

Yeah - all they want is the resulting equation.
You also need the equation for E. Don't forget E is a vector.

 

[need_aca_help]

I really have no idea how to solve this question...

 

[Simon Bridge]

You know how to work out the force on the charge q?

 

[need_aca_help]

You know how to work out the force on the charge q?

I have managed to do the first question.

Not sure how to do the second one...

 

[Simon Bridge]

The first one asks for the electric field - which you should have as a strength and direction.
The second one asks you to find the force as a result - what is the relationship between electric field and the force on a charge?
Hint: you gave the equation in post #1.

 

[need_aca_help]

The first one asks for the electric field - which you should have as a strength and direction.
The second one asks you to find the force as a result - what is the relationship between electric field and the force on a charge?
Hint: you gave the equation in post #1.

God thinking too hard on a one question resulted in tunnel vision.

Problem solved. Thank you.

 

[Simon Bridge]

No worries.