A 36 meter long steel wire has a cross-section area of 0047, Ask an Expert

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A 3.6 meter long steel wire has a cross-section area of 0.047 cm2. Its proportional limit has a value of 0.0015 times its Young's modulus. Its breaking stress has a value of 0.0069 times its Young's modulus. The wire is fastened at its upper end and hangs vertically.

(a) Find how great a weight can be hung from the wire without exceeding the proportional limit?

(b) Find how much will the wire stretch under this load?

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