aded (pink) arec 68 mm 68 mm 68 mm 68 mm 68 mm 68 mm 98740460 X mm4 mm4 mm mm

International Edition---engineering Mechanics: Statics, 4th Edition
4th Edition
ISBN:9781305501607
Author:Andrew Pytel And Jaan Kiusalaas
Publisher:Andrew Pytel And Jaan Kiusalaas
Chapter9: Moments And Products Of Inertia Of Areas
Section: Chapter Questions
Problem 9.43P
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**Title: Determining the Second Moments of Area and Radii of Gyration**

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**Objective:**
Calculate the second moments of area in mm\(^4\) and the radii of gyration in millimeters for the shaded (pink) area with respect to the centroidal \(x'\)- and \(y'\)-axes.

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**Diagram Explanation:**

- The diagram shows a vertically symmetrical pink polygon with respect to the \(y'\)-axis, marked with dimensions indicating key measurements.
- The width and height each consist of two sections measuring 68 mm, making the total dimensions 136 mm by 272 mm.
- A centroidal reference is marked at the center of the polygon, where the \(x'\) and \(y'\) axes intersect, with dimensions marked equally on either side to ensure symmetry.

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**Measurements:**

- **Second Moment of Area:**
  - \( \bar{I}_{x'} = 98740460 \, \text{mm}^4 \)
  - \( \bar{I}_{y'} =\) (to be determined)

- **Radii of Gyration:**
  - \( \bar{k}_{x'} =\) (to be determined)
  - \( \bar{k}_{y'} =\) (to be determined)

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The provided dimensions and axes allow for the calculation of structural properties critical in engineering analyses, such as stress distribution and bending resistance.
Transcribed Image Text:**Title: Determining the Second Moments of Area and Radii of Gyration** --- **Objective:** Calculate the second moments of area in mm\(^4\) and the radii of gyration in millimeters for the shaded (pink) area with respect to the centroidal \(x'\)- and \(y'\)-axes. --- **Diagram Explanation:** - The diagram shows a vertically symmetrical pink polygon with respect to the \(y'\)-axis, marked with dimensions indicating key measurements. - The width and height each consist of two sections measuring 68 mm, making the total dimensions 136 mm by 272 mm. - A centroidal reference is marked at the center of the polygon, where the \(x'\) and \(y'\) axes intersect, with dimensions marked equally on either side to ensure symmetry. --- **Measurements:** - **Second Moment of Area:** - \( \bar{I}_{x'} = 98740460 \, \text{mm}^4 \) - \( \bar{I}_{y'} =\) (to be determined) - **Radii of Gyration:** - \( \bar{k}_{x'} =\) (to be determined) - \( \bar{k}_{y'} =\) (to be determined) --- The provided dimensions and axes allow for the calculation of structural properties critical in engineering analyses, such as stress distribution and bending resistance.
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