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Please Help!!! - Just need the last part

Please Help!!! - Just need the last part

Elements Of Electromagnetics
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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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: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
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
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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