Problem 40E
A 4.0-m-long steel wire has a cross-sectional area of 0.050 cm2 .Its proportional limit has a value of 0.0016 times its Young’s modulus (see Table 11.1). 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. (a) How great a weight can be hung from the wire without exceeding the proportional limit?
Step-by-Step Solution:
Solution 40E Step 1 of 3: a) w = 1.6 × 10 3 × 20 × 10 Pa × 5 × 10 m 6 2 3 = 1.6 × 10 N Step 2 of 3: b)l = (F )0 A Y 3 = (1.6 × 10 )(4m) = 6.4 mm
Step 3 of 3
