25 lb 40 lb 24 in. 0.5 in. 4 in. a B Section a – a

Mechanics of Materials (MindTap Course List)
9th Edition
ISBN:9781337093347
Author:Barry J. Goodno, James M. Gere
Publisher:Barry J. Goodno, James M. Gere
Chapter1: Tension, Compression, And Shear
Section: Chapter Questions
Problem 1.4.13P: An L-shaped reinforced concrete slab 12 Ft X 12 ft, with a 6 Ft X 6 ft cut-out and thickness t = 9.0...
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Please solve only C d
25 lb
40 lb
24 in.
0.5 in.
4 in.
a
а
В
Section a – a
Transcribed Image Text:25 lb 40 lb 24 in. 0.5 in. 4 in. a а В Section a – a
The steel box wrench (E=29,000ksi, v=0.32) is
loaded with a 40-lb horizontal force and a 25-lb
vertical force. Find the following for an element
located at point B on Section a-a:
24 in.
1. The non-vanishing resultant internal moments
on section a-a are which of the following?
4 in.
a. (160 i- 600 j+960 k)in · Ib
b. (-160 i+600 j+960 k) in · lb
c. (-960 i+160 j+600 k) in · lb
a
d. (-960 i–160 j-600 k)in · lb
none of the above
2. The normal and shear force components on
е.
section a-a are:
a. V, = 65lb;V, = 40lb; N¸ = 25lb
b. V, =0;V, =40lb; N¸ = 25lb
c. V, = 64;V, = 25lb; N, = 401b
d. V, = 0;V, =-40lb; N, = -25lb
e. none of the above
3. The non-vanishing stress components at point B are:
а.
0 =1.60; T =-4.89ksi;
o, =-4.89; 7, = 3.60ksi;
0, = 2.50ksi; T
d. o, = 4.91ksi; =-4.89ksi;
b.
с.
=-4.89ksi;
е.
none of the above
4. The principal stresses at point B from most tensile to most compressive are:
O1,02,0, = 4.16,–0.8,-5.76
b. o,,0,,0, =5.76,0,-4.16
c. O1,0,,0, =1.9,-2.45,-6.8
d. o1,02,0, =2.45,0,-6.8
e. none of the above
5. The absolute maximum shear strain at B is:
а.
а. 903 де;
b. 2450uɛ ;
с.
45με ;
d. 5920 uɛ;
е.
none of the above
Transcribed Image Text:The steel box wrench (E=29,000ksi, v=0.32) is loaded with a 40-lb horizontal force and a 25-lb vertical force. Find the following for an element located at point B on Section a-a: 24 in. 1. The non-vanishing resultant internal moments on section a-a are which of the following? 4 in. a. (160 i- 600 j+960 k)in · Ib b. (-160 i+600 j+960 k) in · lb c. (-960 i+160 j+600 k) in · lb a d. (-960 i–160 j-600 k)in · lb none of the above 2. The normal and shear force components on е. section a-a are: a. V, = 65lb;V, = 40lb; N¸ = 25lb b. V, =0;V, =40lb; N¸ = 25lb c. V, = 64;V, = 25lb; N, = 401b d. V, = 0;V, =-40lb; N, = -25lb e. none of the above 3. The non-vanishing stress components at point B are: а. 0 =1.60; T =-4.89ksi; o, =-4.89; 7, = 3.60ksi; 0, = 2.50ksi; T d. o, = 4.91ksi; =-4.89ksi; b. с. =-4.89ksi; е. none of the above 4. The principal stresses at point B from most tensile to most compressive are: O1,02,0, = 4.16,–0.8,-5.76 b. o,,0,,0, =5.76,0,-4.16 c. O1,0,,0, =1.9,-2.45,-6.8 d. o1,02,0, =2.45,0,-6.8 e. none of the above 5. The absolute maximum shear strain at B is: а. а. 903 де; b. 2450uɛ ; с. 45με ; d. 5920 uɛ; е. none of the above
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