The structure below supports a 400-kg mass at G and is supported by a pin joint...

 

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The structure below supports a 400-kg mass at G and is supported by a pin joint C and a rope AB. The structure consists of the vertical bar CDE, the L-shaped bar DF, and the horizontal bar BEFG. The connections at D, E, and F are held together by pins and all bars are rigid (i.e. BEFG doesn't hinge about itself at E and F and DF doesn't hinge about its "L" corner). a.) Is this a truss or a frame? Describe how you can tell the difference. b.) Identify whether any two-force members are present in the structure. c.) Determine the forces experienced at joint D on member EDC and find the force in the rope AB. Report the forces on EDC in Cartesian vector form. 800 mm B 400 mm- D E 400 mm- + 200 mm 800 mm F 400 mm- G 4 The structure below supports a 400-kg mass at G and is supported by a pin joint C and a rope AB. The structure consists of the vertical bar CDE, the L-shaped bar DF, and the horizontal bar BEFG. The connections at D, E, and F are held together by pins and all bars are rigid (i.e. BEFG doesn't hinge about itself at E and F and DF doesn't hinge about its "L" corner). a.) Is this a truss or a frame? Describe how you can tell the difference. b.) Identify whether any two-force members are present in the structure. c.) Determine the forces experienced at joint D on member EDC and find the force in the rope AB. Report the forces on EDC in Cartesian vector form. 800 mm B 400 mm- D E 400 mm- + 200 mm 800 mm F 400 mm- G 4