# Book Errata

## Mechanics of Materials

### Textbook for a Fundamental Mechanics Course

Published January 11, 2010
410 Pages
ISBN: 978-1-58503-154-2

## Errata

Chapter 2 Page 32

Problem 14: Decrease in diameter changed from 1.9415 to 1.999695.

Chapter 3 Page 34

Problem 3.3: P = 20 k and L = 12". Change Problem Number from 3.1 to 3.3.

Chapter 3 Page 34

Problem 3.4: Change Problem Number 3 to 3.3 in the question.

Chapter 3 Page 34

Problem 3.7: Name the point where P acts as point D.

Chapter 3 Page 35

Problem 3.8: Assume ∝ = 0.00002 / F.

Chapter 3 Page 35

Problem 3.9: Change the Problem Number in the quetion from 3.8 to 3.7.

Chapter 3 Page 35

Problem 3.10: Assume E = 29000Ksi adn A = in2.

Chapter 3 Page 37

Problem: 3.12: Allowable stress in concrete = 2Ksi and Steel = 30Ksi.

Chapter 3 Page 37

Problem 3.13: E = 29000Ksi.

Chapter 4 Page 20

Problem 4.2: Extension of 0.043 mm.

Chapter 4 Page 21

Problem 4.6: Plate measures 8.00678*6.0084.

Chapter 4 Page 21

Problem 4.7: Values of Px = 200K, Py = 100K, Pz = -150K.

Chapter 4 Page 21

Problem 4.8: Make the stress notations as σ instead of ?.

Chapter 4 Page 22

Problem 4.10: Cancel P = 120 kips, Poisson's ration = 0.2., lateral strain 0.0025.

Chapter 4 Page 22

Problem 4.11: The dimensions of the aluminium bar should be 25mm x 25mm x 100mm. Change the Description to read: "An aluminium bar (E=70 GPa, v=0.23) has a cross section of 25mm x 25mm and is 100mm long." In the figures change the depth dimension to 25mm.

Chapter 5 Page 30

Problem 5.4: Change the diameter to 1".

Chapter 5 Page 30

Problem 5.5: Change the inner diameter to ½ inch.

Chapter 5 Page 30

Problem 5.8: Change the inner diameter to ½ inch.

Chapter 5 Page 31

Problem 5.12: Add value of G = 10902 Ksi.

Chapter 5 Page 31

Problem 5.14: Remove suffix 2, use the values of L in suffix 1 and suffix 2 as L1 and L2.

Chapter 5 Page 33

Problem 5.16: Use Poisson's ratio = 0.3.

Chapter 5 Page 33

Problem 5.18: Change axial stiffness to torsional stiffess.

Chapter 5 Page 33

Problem 5.19 i: a=4", b=5", and t=¼" and use G=10,000Ksi.
Problem 5.19 ii: a=10", b=2", and t=¼" and use G=10,000Ksi.

Chapter 5 Page 34

Problem 5.20: T=20K.in,

Material A = Steel, Gst = 12,000Ksi
Material B = Aluminium, Gal = 4000Ksi
r1=1", r2=1.25", r3=1.5".

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