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Academics – Applied Mechanics : 2013/MAR/02
Question

Q6. A high voltage cable, 220 m long, consists of 24 strands of 3 mm diameter aluminium wire and eight strands of 4 mm diameter steel wire. It is subject to a tensile force of 16 kN.

Calculate EACH of the following:

(a) The stress in EACH material;

(b) The extension of the cable.

Note: Modulus of Elasticity for Steel = 190 GN/m2

Modulus of Elasticity for Aluminium = 68 GN/m2

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