Force per unit length on the wire in the bottom left hand corner.

[missyc8]

1. Homework Statement [/b]
Suppose in the figure that the four identical currents i = 13 A, into or out of the page as shown, form a square of side 64 cm. What is the force per unit length (magnitude and direction) on the wire in the bottom left hand corner? (N/m) Take the positive y direction as up and the positive x direction as to the right.
What is the magnitude of the force per unit length?

(diagram is in following post)

What is the x component of the force per unit length?

What is the y component of the force per unit length?

Homework Equations

F= muo*i1*i2/2*pi*d

The Attempt at a Solution

F= 1.26E-6 * 7A * 7A/ 2*pi* sqrt(2*.64m) = 1.095E-4

i do not know if i am doing this right at all...but this answer is wrong for the the first part..

 

[missyc8]

here is the pic...oops