FBD: Model Answer for System Sketch - mkraska/meclib GitHub Wiki

We assume that you have created the FBD: System Sketch of the FBD Example Question.

Now we provide the model answer for the free body diagram, so that the correct sketch will be produced in the preview upon [Fill in the correct responses]

How to Obtain the Model Answer?

Remove the hidden attributes from the paragraphs with the input blocks in the Question text.
(optional) Set the width of the input fields to 50
Save and continue editing, Preview
Edit the sketch to produce a correct FBD (there are usually multiple correct variants, differing e.g. by assumed orientation of the reactions),
Copy the contents of the objects input field (the first one).
Paste to the Question variables just below the definitions of init

Question Variables

assign the copied text to tansdata
convert to JSON and assign to tans
Also copy the contents of the second input field and assign it to tansnames

tansdata: [
  ["grid","","",-2,5,-4,4,40],
  ["bar","1",[0,0],[1,-2],"hide"],
  ["beam","white","gray80",[0,0],[3,0],0.15,"show"],
  [ "crosshair","", [0, 0], [0,0], [1,1], [1,1], "grid" ],
  ["dim","a",[3,2],[4,2],0],
  ["fix12","C",[1,-2],0,"show"],
  ["fix13","B",[3,0],180,"hide"],
  ["node","A",[0,0]],
  ["q","","q_0",[0,0.2],[3,0.2],0,1,0,"hide"],
  ["forceGen","F_2",[-1,3]],
  ["momentGen","M_1",[1,3]],
  ["force","F_1",[0.2,-0.4],[0.7800000000000001,-1.5600000000000003],10,"active"],
  ["moment","M_B",[3,0],[2.7,-0.5],[3.5000000000000018,-0.5],"active"],
  ["force","B",[3,0],[4,0],10,"active"],
  ["force","3/2 q_0 a",[2,1.6],[2,0.5],10,"active"]
];
tans: stackjson_stringify(tansdata);
tansnames: [0,[12],"show",[0,0],"a","show",[13,14],"A",[15],0,0,F_1,M_B,B,3/2*q_0*a];

Input `objects`

Set Model answer to tans

Check