Please Help!!! - Just need the last part
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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- Please Help!!!
- Just need the last part

Transcribed Image Text:A wooden beam is fabricated by nailing together three boards as shown. The boards have dimensions of by - 18 in., d4 = 1.9 in., bą -
1.9 in., d2 = 17 in., b3 = 9 in., and d3 = 1.9 in. The vertical distance from the bottom edge of the section to the centroid is 12.333 in.
Determine the moment of inertia of the section about the z axis.
bị
Nail A
di
d2
b2 -
dz
Nail B
b3
Correct.
Consider the section as three rectangles: the top flange (1), the web (2), and the bottom flange (3). Use the parallel axis theorem
to calculate the moment of inertia of the top flange (1) about the z axis.
Answer:
1- 1942.7695
in.4
Correct.
Use the parallel axis theorem to calculate the moment of inertia of the web (2) about the z axis.
Answer:
12- 898.58026
in 4

Transcribed Image Text:Part 3
Correct.
Use the parallel axis theorem to calculate the moment of inertia of the bottom flange (3) about the z axis.
Answer:
I3= 2220.837
in.4
Part 4
Determine the area moment of inertia of the section about the z axis.
Answer:
i
in.4
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