What is the maximum load that could be suspended from a copper wire of length 1.8 m and radius 1.2 mm without?

Question

What is the maximum load that could be suspended from a copper wire of length 1.8 m and radius 1.2 mm without breaking the wire? Copper has an elastic limit of 2.0 x 10^8 Pa and a tensile strength of 4.5 x 10^8 Pa.
N

Answer 1

Assuming no change in radius as the wire is stretched, the tensile strength (stress) T = F/A (area) so F = AT.
A = pi*0.0012^2
F = pi*0.0012^2*4.5E8 = 2036 N

Answer 2

that is a series circuit with 3 (3) resistances. 2 of the resistors are the 12 ft 18 ga wires, the third is the single hundred ohm resistor. locate the resistance of the wires, and construct the series circuit mathematically.