FIGURE EX29.37 is a cross section through three long wires with linear mass density 50 g/m. They

Question:

FIGURE EX29.37 is a cross section through three long wires with linear mass density 50 g/m. They each carry equal currents in the directions shown. The lower two wires are 4.0 cm apart and are attached to a table.
What current I will allow the upper wire to €œfloat€ so as to form an equilateral triangle with the lower wires?

4.0 cm FIGURE EX29.37