1. Homework #3 Due Date: 15th Mar, 2011(Tuesday) (Turn in your assignment in the mailbox of S581 outside the ME general office) The solutions must be written on single-side A4 papers only.

2. HW 3-Problem #1 A loading crane consisting of a steel girder ABC supported by a cable BD is subject to a load P; the cable has effective cross-sectional area A=481mm 2 ; the dimensions of the crane are H=1.6m, L 1 =3.0m, L 2 =1.5m. (1) if the load P=32KN, what’s the average tensile stress in the cable? (2) if the cable stretches by 5.1mm, what is the average strain?

3. HW 3-Problem #2

4. HW 3-Problem #3

5. HW 3-Problem #4

6. HW 3-Problem #5

7. HW 3-Problem #6

8. HW 3-Problem #7