1. Hamrock, Jacobson and Schmid©1998 McGraw-Hill Chapter 4: Normal, Bending, and Transverse Shear Stresses and Strains I am never content until I have constructed a mechanical model of the subject I am studying. If I succeed in making one, I understand; otherwise, I do not. William Thompson (Lord Kelvin) Image: A portion of the collapsed Hyatt Regency Walkway which claimed over 100 lives.

2. Hamrock, Jacobson and Schmid©1998 McGraw-Hill Centroid of Area Figure 4.1 Centroid of Area text reference: Figure 4.1, page 139

3. Hamrock, Jacobson and Schmid©1998 McGraw-Hill Example 4.1 Figure 4.2 Rectangular hole within a rectangular section used in Example 4.1. text reference: Figure 4.2, page 140

4. Hamrock, Jacobson and Schmid©1998 McGraw-Hill Area Moment of Inertia Figure 4.3 Area with coordinates used in describing area moment of inertia. text reference: Figure 4.3, page 140

5. Hamrock, Jacobson and Schmid©1998 McGraw-Hill Example 4.2 Figure 4.4 Circular cross section, used in Example 4.2. text reference: Figure 4.4, page 141

6. Hamrock, Jacobson and Schmid©1998 McGraw-Hill Parallel-Axis Theorem Figure 4.5 Coordinates and distance used in describing parallel-axis theorem. text reference: Figure 4.5, page 142

7. Hamrock, Jacobson and Schmid©1998 McGraw-Hill Example 4.3 Figure 4.6 Triangular cross section with circular hole within it. text reference: Figure 4.6, page 143

8. Hamrock, Jacobson and Schmid©1998 McGraw-Hill Example 4.4 Figure 4.7 Circular cross-sectional area relative to x’-y’ coordinates, used in Example 4.4. text reference: Figure 4.7, page 144

9. Hamrock, Jacobson and Schmid©1998 McGraw-Hill Centroid, Area Moment of Inertia and Area Table 4.1 Centroid, area moment of inertia, and area for seven cross sections. text reference: Table 4.1, page 146

10. Hamrock, Jacobson and Schmid©1998 McGraw-Hill Centroid, Area Moment of Inertia and Area (cont.) Table 4.1 Centroid, area moment of inertia, and area for seven cross sections (part 2 of 2). text reference: Table 4.1, page 146

11. Hamrock, Jacobson and Schmid©1998 McGraw-Hill Mass Element Figure 4.8 Mass element in three- dimensional coordinates and distance from the three axes. text reference: Figure 4.8, page 147

12. Hamrock, Jacobson and Schmid©1998 McGraw-Hill 2D Mass Element Figure 4.9 Mass element in two dimensional coordinates and distance from the two axes. text reference: Figure 4.9, page 147

13. Hamrock, Jacobson and Schmid©1998 McGraw-Hill Mass and Mass Moment of Inertia Table 4.2 Mass and mass moment of inertia for six solids. text reference: Table 4.2, page 148

14. Hamrock, Jacobson and Schmid©1998 McGraw-Hill Mass and Mass Moment of Inertia (cont.) Table 4.2 Mass and mass moment of inertia for six solids. text reference: Table 4.2, page 148