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A steel wire of radius r is stretched wi...

A steel wire of radius r is stretched without tension along a straight line with its ends fixed at A and B (figure). The wire is pulled into the shape ACB. Assume that d is very small compared to length of the wire. Young’s modulus of steel is Y.
(a) What is the tension (T) in the wire?
(b) Determine the pulling force F. Is F larger than T?

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