Solution:
First of all, let's redraw the diagram to number the joints.
Now, Assuming compressive forces as negative and tensile forces as positive .
For Joint 1,
F1Sin 60 +10 = 0
F1= 11.547 (c) # Sin 60= 1.547
F2 + F1cos 60 = 0
F2= 5.7735 (T)
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For Joint 2:
F4 + F1Sin 60 = 0
F4= 10 N (T)
F3 = F1cos 60
F3= 5.7735 (C)
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For Joint 3:
F4 + F5Sin 60 = 0
F5= 11.547 (C)
F6 = F2- F5cos 60
F6= 11.547 (T)
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For joint 4:
F7=0 (z) (zero force member)
F10= F6
F10= 11.547 (T)
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For Joint 6:
F11 = 0, Zero force member
F8 = 0 , Zero force member
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For Joint 7:
Fg Sin 60 +F11 +20 =0
Fg = 23.094 (c)
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Now, there we can illustrate the representation of Forces:
Here, tensile forces are away from the joints
Compressive forces are towards the joint.
The structure is in static equilibrium. It is constructed using two-force members, joined at their ends....
Question 7 is related to the force vs mass graph that is provided and the first section of the excel sheet. Question 3 has to do with the force bs acceleration graph and second section of the excel sheet. The first two files are showing the equations that are supposed to be used to find these answers. Any help would be greatly appreciated. I mainly need assistance on number 1 and 2 now. The question with the free body diagram...