A 4.0-m-long steel wire has a cross-sectional area of 0.050cm2. Its proportional limit has a value of 0.0016 times its Young's modulus. Its breaking stress has a value of 0.0065 times its Young's modulus. The wire is fastened at its upper end and hangs vertically.

Question

A. How great a weight can be hung from the wire without exceeding the proportional limit? Take the Young's modulus for the rod to be Y=2.0×1011Pa.

B. How much will the wire stretch under this load?

lost · Accepted Answer

thank you!

Mitch · Answer

A) F = 0.0016YA, F= 1600N B) Delta L = FL/AY, Delta L = 0.0064 m or 6.4 mm C) F = 0.0065YA, F = 6500N ----------------------------------------- Just did this problem and it's correct, I got'chu.

Anonymous · Answer

How great a weight can be hung from the wire without exceeding the proportional limit? Take the Young's modulus for the rod to be Y=2.0×1011Pa.