7.4-17 A sign is supported by a pole of hollow circular cross section, as shown in the figure. The outer and inner diameters of the pole are 10.5 in. and 8.5 in., respectively. The pole is 42 ft high and weighs 4.0 k. The sign has dimensions 8 ft × 3 ft and weighs 500 lb. Note that its center of gravity is 53.25 in. from the axis of the pole. The wind pressure against the sign is 35 lb/ft². (a) Determine the stresses acting on a stress element at point A, which is on the outer surface of the pole at the "front" of the pole, that is, the part of the pole nearest to the viewer. (b) Determine the maximum tensile, compressive, and shear stresses at point A. -8 ft- Hilda's Office 3 ft -10.5 in:- 42 ft +8.5 in.- X|X A A Section X-X

7.4-17 A sign is supported by a pole of hollow circular cross section, as shown in the figure. The outer and inner diameters of the pole are 10.5 in. and 8.5 in., respectively. The pole is 42 ft high and weighs 4.0 k. The sign has dimensions 8 ft × 3 ft and weighs 500 lb. Note that its center of gravity is 53.25 in. from the axis of the pole. The wind pressure against the sign is 35 lb/ft². (a) Determine the stresses acting on a stress element at point A, which is on the outer surface of the pole at the "front" of the pole, that is, the part of the pole nearest to the viewer. (b) Determine the maximum tensile, compressive, and shear stresses at point A. -8 ft- Hilda's Office 3 ft -10.5 in:- 42 ft +8.5 in.- X|X A A Section X-X

Mechanics of Materials (MindTap Course List)

9th Edition

ISBN:9781337093347

Author:Barry J. Goodno, James M. Gere

Publisher:Barry J. Goodno, James M. Gere

Chapter5: Stresses In Beams (basic Topics)

Section: Chapter Questions

Problem 5.12.11P: A cylindrical brick chimney of height H weighs w = 825 lb/ft of height (see figure). The inner and...

See similar textbooks

Similar questions

Determine Iu for the inverted T-section shown. Note that the section is symmetric about the y-axis.
A cylindrical brick chimney of height H weighs w = 825 lb/ft of height (see figure). The inner and outer diameters are d1= 3 ft and d2= 4 ft, respectively. The wind pressure against the side of the chimney is p = 10 lb/ft2 of projected area. Determine the maximum height H if there is to be no tension in the brickwork.
The boom in the figure below (Figure 1) weighs 3000 NN and is attached to a frictionless pivot at its lower end. It is not uniform; the distance of its center of gravity from the pivot is 40%% of its length. Make a free-body diagram of the boom. The boom attaches to the building at dot A. The center of gravity of the boom is indicated by dot B. The guy wire attaches to the boom and holds the load at dot C. Find the tension in the guy wire. Find the horizontal component of the force exerted on the boom at its lower end. Find the vertical component of the force exerted on the boom at its lower end
Find the centre of gravity of a T-section with flange 150 mm × 10 mm and web also 150 mm × 10 mm.
The width of the AB planar cover in Figure 2 is 10 m. The cover is sunken. It is articulated at point B. At point A, the wall is smooth. Find the resultant force and find the action centers of the forces Fx and Fy. γsu = 9.79 KN / m3 su= water duvar=wall kapak=cover dimension of AB = 10 units
6. The gate in the figure shown weighs 6 kN for each meter normal to the paper. Its center of gravity is 0.5 m from the left face and 0.6 m above the lower face. Find h for the gate just to come up to the vertical position. Water Stop Hinge o 1.5 m Dam
4. Given: Curb shown below Find: (1) Surface area and (2) volume 100 mm 150 mm 4 m 30° 150 mm 150 mm
Problem 2 The resultant of three parallel loads (one is missing in Fig. P-2) is 13.6 kg acting up at 3 m to the right of A. Compute the magnitude and position of the missing load. Y P 18 kg 27 kg A 0.6 m 3.4 m Figure P-2
Problem 3: Inputs: a = 12 in b = 12.75 in Use the scalar approach (not the cross product). The moment exerted by the weight about point E is 244 lb-in. Table not required, but feel free to use it if you like (a) What is the magnitude of the weight? (round this answer to the nearest whole number) (b) What is the moment exerted by the weight about point S? Problem 4: Inputs: a = 1.2 m b = 0.5 m P = 50 N We are going to put this system in equilibrium. We haven't talked much about equilibrium yet, but that's okay. In order for a body to be in equilibrium, we need the sum of the forces to equal zero, and the sum of the moments about any point to equal zero. S A Table not required, but feel free to use it if you like a FA 30° a E b 40° P b (a) Let's start by summing moments about point A. Determine the magnitude of FB such that EMA = 0. In other words, compute FB such that the net moment about point A is zero. (b) Now let's repeat the process at B. Sum moments about point B and compute the…
A triangular dam is shown in the figure, base is 6-m and height is 8-m. Compute for the factor of safety against sliding and overturning. Unit weight of concrete is 23.54 kN/cu.m. Consider 1 meter length strip. Disregard hydrostatic uplift pressure. The coefficient between the dam and the foundation is 0.8. h
Find the coordinates of the centroid of the shaded area in the figure. (XG=?, YG=? ) Find the moments of inertia of the axis set passing through the center of gravity.(IXG=?,IYG=?)
EXAMPLE: 7. Show the V-M diagram using Area Method of the following beam: 1000 lb 400 lb/ft 5 ft R₂ 10 ft 2000 lb + 200 lb/ft 10 ft