A wire of length 5.00 m with a cross-sectional area of 0.100 cm2 stretches by 6.50 mm when a load of 1.00kN is hung from it. What is the Young’s modulus for this wire? Four brass wires are subjected to the same tensile stress. The wires have unstretched lengths and diameters as follows. Rank the four wires in decreasing order of the amount of stretch.
(a) length , diameter
(b) length 2, diameter
(c) length 4, diameter /2
(d) length /4, diameter /2
