Find the moment of inertia and radius of gyration of the section of this bar about an axis parallel to x-axis going through the center of gravity of the bar. The bar is symmetrical about the axis parallel to y-axis and going through the center of gravity of the bar and about the axis parallel to z-axis and going through the center of gravity of the bar.
Find the moment of inertia and radius of gyration of the section of this bar about an axis parallel to x-axis going through the center of gravity of the bar. The bar is symmetrical about the axis parallel to y-axis and going through the center of gravity of the bar and about the axis parallel to z-axis and going through the center of gravity of the bar.
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Transcribed Image Text:Formulas
Moments of Inertia
x= [y²d
ly = fx²dA
Theorem of Parallel Axis
Ixr = 1 + d² A
* axis going through the centroid
x' axis parallel to x going through the point of interest
d minimal distance (perpendicular) between x and x'
ly₁ = 15+d²A
ỹ axis going through the centroid
y' axis parallel to y going through the point of interest
d minimal distance (perpendicular) between y and y'
Composite Bodies
1=Σ 4
All the moments of inertia should
be about the same axis.
Radius of Gyration
k=

Transcribed Image Text:Find the moment of inertia and radius of gyration of the section of this bar about an axis parallel to
x-axis going through the center of gravity of the bar.
The bar is symmetrical about the axis parallel to y-axis and going through the center of gravity of the
bar and about the axis parallel to z-axis and going through the center of gravity of the bar.
The dimensions of the section are:
. 1-56 mm, h-29 mm
.
The triangle: hy-11 mm, lj-16 mm
•
and the 2 circles: diameter-7.8 mm, hc-9 mm, de-6 mm.
l+
A
hr
O
A
Ľ+
l
A is the origin of the referential axis.
Provide an organized table and explain all your steps to find the moment of inertia and radius of
gyration about an axis parallel to x-axis and going through the center of gravity of the bar.
Does the radius of gyration make sense?
In the box below enter the y position of the center of gravity of the bar in mm with one decimal.
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