A steel bar of 40 mm × 40 mm square cross-section is subjected to an axial compressive load of 200 kN. If the length of the bar is 2 m and E = 200 GPa, the elongation of the bar will be:
Module 1 (2)

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Mechanics of Materials
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
1.25 mm
2.70 mm
4.05 mm
5.40 mm
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In terms of Poisson's ratio (μ) the ratio of Young's Modulus (E) to Shear Modulus (G) of elastic materials is
2(1+ μ)
2(1-μ)
0.5(1+μ)
0.5(1-μ)
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The relationship between Young's modulus (E), Bulk modulus (K) and Poisson's ratio (μ) is given by:
E= 3 K (1-2μ)
K= 3E(1-2μ)
E= 3K(1-μ)
K= 3E(1-μ)
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is true (μ= Poisson's ratio)
0 < μ < 1/2
1 < μ < 0
1 < μ < -1
2 < μ < -2
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
For a linearly elastic, isotropic and homogeneous material, the number of elastic constants required to relate stress and strain is:
2
3
4
6
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The number of elastic constants for a completely anisotropic elastic material which follows Hooke's law is:
3
4
21
25
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
An orthotropic material, under plane stress condition will have---- independent elastic constants
15
4
5
9
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