Electric Field of Equilateral Triangle

[Brendan Webb]

Homework Statement

Consider an equilateral triangle of side 15.6cm. A charge of +2.0μC is placed at one vertex and charges -4μC each are placed at the two. Determine the electric field at the centre of the triangle.

Homework Equations

E=kQ/r^2

The Attempt at a Solution

I am hoping someone can check my methodology and possibly my answer too and let me know if it looks correct. I calculated the components of the vectors and added them and I believe I have it correct.

Thanks

 

[kuruman]

Your methodology and numbers are correct.

 

[Brendan Webb]

Thanks!