3.1 Calculate the position of the centroids and the second moment of areas about the horizontal and vertical axes through the centroid for the built-up section in Figure 1. Use the section tables for standard sections (all dimensions are in mm).

3.1 Calculate the position of the centroids and the second moment of areas about the horizontal and vertical axes through the centroid for the built-up section in Figure 1. Use the section tables for standard sections (all dimensions are in 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 9.13P: Figure (a) shows the cross section of a column that uses a structural shape known as W867...

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Concept explainers

Center of Gravity and Centroid

The term center of gravity indicates the position or location of a point about which the whole weight of a body or system is supposed to be concentrated, which means the whole weight of the body or system works through this point. It is closely related to mass distribution. For all positions of the body, the center of gravity would be a single point.

Question

3.1 Calculate the position of the centroids and the second moment of areas about the
horizontal and vertical axes through the centroid for the built-up section in Figure 1.
Use the section tables for standard sections (all dimensions are in mm).
100
100 x 75 x 8 mm
unequal-leg angles
690 x 15 mm plate
Figure 1
-700 mm-

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3.1. Determine the location of the centroid for the cross section shown below and draw a scaled sketch of the cross section, clearly showing the centroid and indicate it's distance from the selected origin. Start your calculations by setting an origin from the bottom, left most point on the cross section. 3.2 Calculate the second moments of areas about the centroid axes for the beam cross section
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