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10.2 A wire is made out of a steel alloy with Y = 2.00×1011Paand breaking stress 1.00×109 Pa . The wire is 5m long and is secured at one end to the ceiling and hangs vertically.
a) A 10kg point mass is attached to one end, the wire elongates by1cm. What is the cross section area of the wire? What is the diameter of the wire(assuming the cross section is circular)?
b) What is the largest mass that can be supported on the end ofthe wire before it breaks?
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