Draw the FBD for bar BCD The connections at A and B are ball-and-socket joints, C is a slider bearing, and D is a thrust bearing. Assume that the weights of members are negligible and recognize that AB is a two-force member How many unknowns appear on the FBD? Solve for the unknowns.

In the diagram below shows a truss structure which is subjected to an applied load and supported by joints namely pin and rollers. A) draw the fbd of the given truss system in the diagram below and solve for the unknown  support reactions

3. Draw complete, clearly labeled free-body diagrams. All unknown support reactions should be clearly labeled with a variable name.  All known values such as weight or applied forces should be clearly labeled with their known values. Don't need to show equilibrium equations, I just need free-body diagrams. Only solve this text question, not the questions in image.

The structure shown below is a simplified tower crane. It carries a shipping crate suspended from B that has a weight of 116 kN . The main jib DCB (in green) has a weight of 17 kN concentrated in the center of the beam. This is pinned to the main body at D and is supported by a cable that is routed through pulleys at F and G and is attached to a concrete counterweight J. The main body AEFG (in yellow) is fixed to the ground at A.   Various geometry: h1= 26.5 m h2= 3.9 m h3= 5.1 m l1= 12.8 m l2= 17 m l3= 4.3 mm θ= 57.6 degrees   Assumptions :  The main body AEFG can be considered massless. The cable CFGJ is massless. The pulleys at F and G can be considered massless, frictionless, and of negligible diameter. All bodies are considered rigid.   Questions:  Determine the weight of counterweight J in order for the main jib DCB to be horizontal. Determine the magnitude of the x and y components of force at pin D. Determine the reactions at fixed support A.