ENGINEERING FUNDAMENTALS
6th Edition
ISBN: 9781337705011
Author: MOAVENI
Publisher: CENGAGE L
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Chapter 7, Problem 38P
To determine
Find the second moment of area for a
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Physics
You have three 24 ft long wooden 2x6's and you want to nail them together in two possible arrangements as shown below to make the stifest possible
beam. The stiffness of a beam is proportional to the moment of inertia of the beam's cross-section about a horizontal axis passing through its centroid. The
actual dimensions of nominal 2x6 lumber are 1.5 in by 5.5 in.
Arrangement A:
Arrangement B:
Which of the following option is correct?
O Arrangement A has approximately 3.62 times the stiffness of arrangement B
O Both arrangements A & B are equally stiff.
O Arrangement B has approximately 3.62 times the stiffness of arrangement A
O Arrangement A has approximately 7.24 times the stiffness of arrangement B
For the given figure below, determine the force that would cause the bar to deform by 1.8x10^-2 inches. Other properties:
X-sectional area: 0.25 in^2.
E-steel 29x10^6 Ibs/in^2
E-alum= 10x10^6 lbs/in^2.
P-
Steel
Steel
Aluminan
C 2440 Ibs
04550 Ibs
03520 Ibs
4450 Ibs
Calculate the second moment of areas for two h" x w" pieces of lumber about the x-x and y-y axes as shown. Also, by what factor do you increase the resistance to bending (about x-x axis) if you were to use Lumber B over Lumber A?
LUMBER A:
h =
4
in
w =
8
in
LUMBER B:
h =
10
in
w =
3
in
Chapter 7 Solutions
ENGINEERING FUNDAMENTALS
Ch. 7.2 - Prob. 1BYGCh. 7.2 - Prob. 2BYGCh. 7.2 - Prob. 3BYGCh. 7.2 - Prob. 4BYGCh. 7.2 - Prob. 5BYGCh. 7.2 - What does strain represent?Ch. 7.2 - Prob. BYGVCh. 7.5 - Prob. 1BYGCh. 7.5 - Describe two different methods that you can use to...Ch. 7.5 - Prob. 3BYG
Ch. 7.5 - Prob. 4BYGCh. 7.5 - Prob. 5BYGCh. 7.5 - Prob. BYGVCh. 7 - Prob. 1PCh. 7 - Prob. 2PCh. 7 - Prob. 3PCh. 7 - Prob. 4PCh. 7 - Prob. 5PCh. 7 - Prob. 6PCh. 7 - Prob. 7PCh. 7 - Prob. 8PCh. 7 - Prob. 9PCh. 7 - Prob. 10PCh. 7 - Investigate the diameter of the electrical wire...Ch. 7 - Prob. 12PCh. 7 - Prob. 13PCh. 7 - Prob. 15PCh. 7 - Prob. 17PCh. 7 - Using area as your variable, suggest ways to cool...Ch. 7 - Prob. 19PCh. 7 - Prob. 20PCh. 7 - Prob. 21PCh. 7 - Prob. 22PCh. 7 - Prob. 23PCh. 7 - Prob. 24PCh. 7 - Prob. 25PCh. 7 - Prob. 26PCh. 7 - Prob. 27PCh. 7 - Prob. 28PCh. 7 - Prob. 30PCh. 7 - Prob. 31PCh. 7 - Prob. 32PCh. 7 - Prob. 33PCh. 7 - Prob. 34PCh. 7 - Prob. 35PCh. 7 - Prob. 36PCh. 7 - Prob. 37PCh. 7 - Prob. 38PCh. 7 - Prob. 39PCh. 7 - Prob. 40PCh. 7 - Prob. 41PCh. 7 - Prob. 42PCh. 7 - A 10 cm long rectangular bar (when subjected to a...Ch. 7 - Prob. 44PCh. 7 - Prob. 45PCh. 7 - Prob. 46PCh. 7 - Prob. 47PCh. 7 - Prob. 48PCh. 7 - Prob. 49PCh. 7 - Prob. 50P
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