1. The problem statement, all variables and given/known data In the figure (Figure 1) the top wire is 1.1−mm -diameter copper wire and is suspended in air due to the two magnetic forces from the bottom two wires. The current flow through the two bottom wires is 87A in each. Find the Current through the Copper wire. 2. Relevant equations F/L = I1 I2 U0 /2pi*r 3. The attempt at a solution The furthest I've got was to resolve the force on M 2FCos30 F/1 = 2(87^2 * 4pi * 10^-7 / 2*pi*0.038) Cos 30 I don't know where to go with this one.