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Q9. A winch cable comprises a central steel wire of 7.5 mm diameter encased by six alloy wires each of 4 mm diameter. The maximum permissible stress within the alloy wires is 55 MN/m²

Calculate EACH of the following:

(a) the maximum load the cable can lift vertically; (10)

(b) the equivalent modulus of elasticity for the winch cable. (6)

Note:

Modulus of Elasticity for steel= 205 GN/m²

Modulus of Elasticity for alloy= 100 GN/m²