The blade of the bulldozer shown below is rigidly attached to a linkage consisting of the arm AB, which is controlled by the hydraulic cylinder BC. There is an identical linkage on the other side of the bulldozer. Applied loads shown are for both linkages and F = 581 kN.Determine the magnitude of the pin reaction at B in kN.

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.

Two bars connected by a sliding block are shown in the figure. If the effect of friction is not taken into account, perform the following operations: 1.1 Draw the Free Body Diagram (F.B.D.). (1.0 point) 1.2 Determine the moment Ma​ necessary to keep the system in equilibrium. (1.0 point) 1.3 Determine the magnitude of the reaction at support A. (1.0 point) 1.4 Determine the magnitude of the reaction at support B. (1.0 point) 1.5 Determine the magnitude of the reaction at joint C. (1.0 point)