A 2.4 m ladder rests on a vertical wall as shown in the figure. The ladder has seven rungs and the rungs are spaced 0.30 m apart, and the top and bottom rungs are 0.30 m from their respective ends of the ladder. Surfaces at A and B both have the same coefficient of friction. If a worker weighs 630 N and stands on the middle rung, determine the minimum value of the coefficient of friction so that the ladder does not slide. Neglect the weight of the ladder.

Q: PROBLEM 12.31 A 10-1b block B rests as shown on a 20-ls bracket A. The coefficients of friction are…

A: from image finding the equationL=x0-xa+xp-xa+yc0=VB-VA+0-Va+VCsince B does not slide ,…

Q: A gravity dam made of concrete is shown in Figure 2. Consider hydrostatic uplift and water at normal…

A:

Q: A cable is attached to a 2.20 kg block A, is looped over a fixed peg at C, and is attached to plate…

A:

Q: 3.36 Determine the magnitude and location of the resultant for the load system shown. 8 kips/ft 5…

A:

Q: An aircraft hanger has a semi-circular cross section of diameter 50m and its longitudinal axis is…

A: Hangars for airplanes are usually referred to as "glorified garages." They can range from basic…

Q: SITUATION II: A boom supports a 100-N load as shown in the figure. 4. 5. 6. 200 N 10 m 10 m What is…

A: Given To find The value of angle θ The value of angle α The value of axial force in beam

Q: A sign for an automobile service station is supported by two aluminum poles of hollow circular cross…

A:

Q: 6...1

A: Step 1: concept usedsum of moment = 0C.W. moment = A.C.W. moment Step 2: FBD Step 3: resolve the…

Q: Q9 The figure below shows a three-pinned parabolic arch carrying a point load. Derive the function…

A:

Q: Perform double integration of the bending moment equations. You will obtain deflections in this…

A: Given:Required:Integration constant C2

Q: c) the value of the maximum bending moment in the beam. Enter your answer in KNM to three decimal…

A:

Q: A steel beam, of lengths a= 6 m and b = 3 m and a hollow box cross section, is supported by a hinge…

A:

Q: Question 5: The 40-kg boy is sliding down the smooth spiral slide such that z = -2 m/s and his speed…

A:

Stair construction and layout

Stair is a type of vertical transportation in a building which consist of a series of steps in a flight of stairs that enable the vertical movement of people and materials from one floor to another. A staircase consists of steps that comprises of riser & tread, handrail, baluster, stair stringers, newel post and waist slab. The construction of staircase with all the components is termed as stair construction. A staircase is an enclosure that contains the entire stairway. The materials used for the construction of stairs are bricks, reinforced cement concrete, stone, lumber, steel and a combination of these materials.