Demo: Drawing collar boundary conditions

a) Draw the corresponding free body diagram:

(The expected tolerance is 1/2 square grid for position and 10 degrees for angle.)



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Question

Title:
Demo: Drawing collar boundary conditions

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Started at:
2026-08-04 22:49:05 (CDT)
Duration:
0s
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{
  "box": [
    {
      "h1": 40,
      "h2": 40,
      "id": 0,
      "w1": 30,
      "w2": 30,
      "x1": 120,
      "x2": 340,
      "y1": 220,
      "y2": 220,
      "type": "pl-collar-rod",
      "color": "#e0e0e0",
      "graded": false,
      "height": 20,
      "label1": "B",
      "label2": "D",
      "stroke": "#000000",
      "collar1": true,
      "collar2": false,
      "drawPin": true,
      "evented": false,
      "offsetx1": 2,
      "offsetx2": 2,
      "offsety1": 2,
      "offsety2": 2,
      "selectable": false,
      "gradingName": "pl-collar-rod",
      "strokeWidth": 2
    },
    {
      "id": 1,
      "top": 380,
      "left": 20,
      "type": "pl-coordinates",
      "angle": 0,
      "label": "",
      "width": 60,
      "graded": false,
      "labelx": "x",
      "labely": "y",
      "stroke": "#000000",
      "offsetx": -16,
      "offsety": -10,
      "originY": "center",
      "selectable": false,
      "gradingName": "pl-coordinates",
      "strokeWidth": 2,
      "drawEndArrow": true,
      "drawStartArrow": false,
      "offsetx_label_x": 0,
      "offsetx_label_y": -20,
      "offsety_label_x": 0,
      "offsety_label_y": -10,
      "arrowheadWidthRatio": 1,
      "arrowheadOffsetRatio": 1
    },
    {
      "id": 2,
      "x1": 340,
      "y1": 220,
      "top": 160,
      "left": 340,
      "type": "pl-vector",
      "angle": 90,
      "label": "",
      "width": 60,
      "graded": true,
      "stroke": "#c72c1c",
      "evented": false,
      "offsetx": 2,
      "offsety": 2,
      "originY": "center",
      "selectable": false,
      "gradingName": "pl-vector",
      "strokeWidth": 3,
      "trueHandles": [
        "mtr"
      ],
      "drawEndArrow": true,
      "drawErrorBox": true,
      "widthErrorBox": 80,
      "drawStartArrow": false,
      "heightErrorBox": 20,
      "offset_forward": 0,
      "XcenterErrorBox": 340,
      "YcenterErrorBox": 190,
      "disregard_sense": false,
      "offset_backward": 60,
      "optional_grading": false,
      "objectDrawErrorBox": null,
      "arrowheadWidthRatio": 1,
      "arrowheadOffsetRatio": 1
    },
    {
      "id": 3,
      "x1": 230,
      "y1": 240,
      "top": 300,
      "left": 230,
      "type": "pl-vector",
      "angle": -90,
      "label": "",
      "width": 60,
      "graded": true,
      "stroke": "#c72c1c",
      "evented": false,
      "offsetx": 2,
      "offsety": 2,
      "originY": "center",
      "selectable": false,
      "gradingName": "pl-vector",
      "strokeWidth": 3,
      "trueHandles": [
        "mtr"
      ],
      "drawEndArrow": true,
      "drawErrorBox": true,
      "widthErrorBox": 100,
      "drawStartArrow": false,
      "heightErrorBox": 20,
      "offset_forward": 20,
      "XcenterErrorBox": 230,
      "YcenterErrorBox": 260,
      "disregard_sense": false,
      "offset_backward": 60,
      "optional_grading": false,
      "objectDrawErrorBox": null,
      "arrowheadWidthRatio": 1,
      "arrowheadOffsetRatio": 1
    },
    {
      "id": 4,
      "x1": 120,
      "y1": 220,
      "top": 220,
      "left": 120,
      "type": "pl-vector",
      "angle": 0,
      "label": "",
      "width": 60,
      "graded": true,
      "stroke": "#c72c1c",
      "evented": false,
      "offsetx": 2,
      "offsety": 2,
      "originY": "center",
      "selectable": false,
      "gradingName": "pl-vector",
      "strokeWidth": 3,
      "trueHandles": [
        "mtr"
      ],
      "drawEndArrow": true,
      "drawErrorBox": true,
      "widthErrorBox": 140,
      "drawStartArrow": false,
      "heightErrorBox": 20,
      "offset_forward": 60,
      "XcenterErrorBox": 120,
      "YcenterErrorBox": 220,
      "disregard_sense": true,
      "offset_backward": 60,
      "optional_grading": false,
      "objectDrawErrorBox": null,
      "arrowheadWidthRatio": 1,
      "arrowheadOffsetRatio": 1
    },
    {
      "id": 5,
      "top": 220,
      "fill": "#800080",
      "left": 120,
      "type": "pl-arc-vector",
      "angle": 0,
      "label": "",
      "graded": true,
      "radius": 30,
      "stroke": "#800080",
      "offsetx": 0,
      "offsety": 0,
      "originY": "center",
      "endAngle": 210,
      "selectable": false,
      "startAngle": 0,
      "gradingName": "pl-arc-vector",
      "strokeWidth": 3,
      "drawEndArrow": true,
      "drawErrorBox": true,
      "widthErrorBox": 20,
      "drawStartArrow": false,
      "heightErrorBox": 20,
      "XcenterErrorBox": 120,
      "YcenterErrorBox": 220,
      "disregard_sense": true,
      "drawCenterPoint": true,
      "optional_grading": false,
      "clockwiseDirection": true,
      "objectDrawErrorBox": null,
      "arrowheadWidthRatio": 1,
      "arrowheadOffsetRatio": 1
    }
  ]
}
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