The weight is suspended from steel and aluminum wires, each having the same initial length of 3 m and cross-sectional area of 4 mm2. If the materials can be assumed to be elastic perfectly plastic, with (sY)st = 120 MPa and (sY)al = 70 MPa, determine the force in each wire if the weight is (a) 600 N and (b) 720 N. Eal = 70 GPa, Est = 200 GPa.

MECE 201 Fall 2014 Homework 7 Due: Thursday, November 6, 2014 Note: You should use your textbook (Callister and Rethwisch, 9 thedition) to obtain phase diagrams, properties and/or constants required to solve any of the problems. 1. Problem 9.10 parts (a) and (d), also do Problem 14 pertaining to parts (a) and (d) of 9.8. For part (a) refer to Figure 9.8 and for part (b) refer to Figure 9.19. (answer: (a) in back of text) 2. Problem 9.12 3. Problem 9.13 4. Problem 9.19 5. Problem 9.38 Please report your answers to three decimal places. (answer (c): 0.272) 6. Problem