1. The girder in the figure is made from a uniform beam and reinforced at its center with cover plates where its moment of inertia is larger. The 4-m end segments have a moment of inertia of 1 = 280 (10) mm², and the center portion has a moment of inertia of l' = 560(10) mm². Determine the displacement at the center C. Take E = 200 GPa. The reactions are given.

What is the value of the force in the member AB in N? if P = 60-N. (Note: enter your numeric answer only. No need to enter units. Give your answer to three decimal places and negative for compression). AB= -2 m D -2 m- E 1.5 m B.

From the following armor, determine the following: Reactions in A and F. The internal forces at node C. (Indicate whether the forces are in compression or tension.)  The internal forces in the elements CH, CD and HI. (Indicate if the forces are in compression (C) or tension (T)). Draw the respective free-body diagrams. Consider the following:  A and F are supports. the angles a, B, y are angles of 90, 60 and 30 ° respectively (Check image pr2 for the image of the armor) (Check image pr2.2 for the values to be used)