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EM 306 - Hour Examination 2 Version C There are four problems. Each problem is worth 25 points. Lf you draw correct. neat, and appropriate fiee body diagrams, identify all unlcnowns necessary to solve the problem, write a set of o equations in n unknowns that, when solved, will give correct values for all requested unkoowns, and CLEARLY identify the n equations and the n &owns, you can earn 24 of tbe 25 points for that problem. Work careMly and slowly, Apply t h e basic principles. 1. TaLI F b T h e truss is loaded as shown. Find the axial forces in DF, EF, and GI. fBD k700 u = G F 3 x - -7"u b S L p ; - Q l 7 * o f tU 3 b 1 7 . 0 6 %# & @ ha,7 Y ~ F+ J The b m e is loaded as shown. Find all of the forces acting on member ABDF. R~~ 3. The geometric shape shown is a thin plate with a density of 2 kg per square meter. Find the x and y coordinates of the center of gravity of the thin plate. 4. The rigid structure is loaded as shown. Find the reaction forces at the supports. -1 \