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MAE 2101 Statics Practice Exam #2 1. The Howe truss is subjected to the loading shown. Identify any zero-force members. Then determine the force in members GF and CD, and state if the members are in tension or compression. 2. Determine the internal normal force, shear force and bending moment in the beam at point B. Ignore the weight of the bar itself. 3. Draw the shear and moment diagrams for the beam subjected to the forces, moments and loads shown. Denote the locations of pertinent values on the diagrams (maxima, minima, zeros, etc.) R. Gist 1 of 2 Ver. B, Rev. 2 MAE 2101 Statics Practice Exam #2 4. Determine the force P necessary to move the 80-lb crate which has a center of gravity at G. The coefficient of static friction at the floor is μs=0.35. Will the crate tip or slip? G 5. A rope attached to a wooden block passes over a fixed wooden drum as shown. If the block weighs 175 N, the coefficient of static friction between the block and the table is 0.25 and the coefficient of static friction between the rope and the drum is 0.2, find the minimum tension, T, required to move the block. 6. For the machine screw pictured, find the moment required to start unscrewing the screw which had previously been tightened to exert a force of 1000 lb. Assume a radius, r, of 1 inch, a lead of 2 threads per 0.5 inch, and a coefficient of static friction of 0.4. R. Gist 2 of 2 Ver. B, Rev. 2