(3) Truss Analysis & Design (20 pts) A truss which is similar to the one we analyzed in lecture is shown in Figure 3. Relevant data regarding loading, geometry, supports, and design requirements of allowable loads are listed here: - W=40 N (divided, as shown) - Distance from A-to-D is 240 mm (spacing, as shown) - Maximum allowable compression in any member is 180 N - Maximum allowable tension in any member is 735 N - Cross-sectional area of Members (10.89 mm') - Area moment of Inertia of Members, I (8.47 mm") - Nominal Young's Modulus of Balsa Wood, E (2700 N/mm') - Support at A is a roller, and at D is a pin 3 C ZON 20N Figure 3 Using Methods of Sections, complete Table 3. Hint: since h is not known, it is helpd to express any unknown lengths of members in terms of h using the Pythagorean Theorem. Table 3 Solve for force when h=40 mm, 100 Bucklng (Cr). Tenslon Force In member Safety Factor (buckling) length (L) _ _ of F4 1: {written "1 (1.4.), or mm, 150 member In bucglklnI terms Of zero-force mm, OR 9 _ uh") 185 mm. .(6)/(4).. (circle - Choose one of the heights (h) such that each Bridge Project team member does one of the four heights. \"This notation means A: = - W (column 4)