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## Homework Statement

Three long parallel wires are 3.8 cm from one another. (Looking along them, they are at three corners of an equilateral triangle.) The current in each wire is 8.00 A, but its direction in wire A (at the top of the triangle) is opposite to that in wires B and C (the bottom points of the triangle). A comes out of the page, while B and C go into the page. Determine the magnetic force per unit length on each wire due to the other two, and the angle of each force.

## Homework Equations

F/l = [u (2I)]/[2pi (d)]

## The Attempt at a Solution

I can plug into the above equation to find 2.96e-5 N/m. Is this the force for all of the three points? For some reason, the solutions I have indicate that wire A has a different force (5.13e-5 N/m) and I'm not sure why. I am also very unsure how to determine the angles at which these forces point. Is this a vectors problem? I feel like I am missing some pieces of information and I am not sure how to put together what I know to solve this. I'm sorry that this attempt at a solution is so vague...

Again, I would really appreciate some insight!