all details in the file Document Preview: Directions: show ALL of your work. Write out your thought process and/or every step mathematically throughout each problem. Draw FBDs when appropriate.(20 points) A door with rectangular shape is hinged along an axis having direction a lying in the xz place. The door is supported by a cable that has a tensile force F = 100N. Determine the moment of F about line a.(20 points) A machine for smoothing the surface of wet concrete is shown (the guard for the paddles is removed). If the concrete applies force F = 8lb to each paddle, where all forces F lie in the xy plane, determine the force P and orientation a needed so the resultant couple moment of the foces shown is zero. Forces P are parallel to the yz plane.(20 points) A casting supports the forces and moment (double-headed arrow) shown where the 100N forces are parallel to the xy plane and the moment at C has direction angles ?x = 60ø, ?y = 60ø, and ?z = 135ø. Determine the equivalent force system acting at point O.(20 points) A bookshelf holding 11 books is supported by brackets at points A and B. The weights and thicknesses of the books are given in the table. Determine the support reactions.(20 points) A wind tunnel is used to experimentally determine the lift force L and drag force D on a scale model of an aircraft. The bracket supporting the aircraft is fitted with an axial spring with stiffness k = 0.125 N/mm and a torsional spring with stiffness kt = 50 N*m/rad. By measuring the deflections d and ? of these springs during a test, the forces L and D may be determined. If the geometry shown occurs when there is no airflow, and if the springs are calibrated so that d = 0 and ? = 0ø when there is no airflow, determine L and D if d = 2.51mm and ? = 1.06ø are measured.Exam 2MET3022Upload to Blackboard by 11:59pm on March 25 Attachments: Mark.docx
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