PROBLEM 3 The uniform 25 lb-f ladder in the figure below rests against the smooth wall at B, and the end A rests on the rough horizontal plane with coefficient of friction shown in the figure. Determine the angle of inclination (theta) of the ladder and the normal reaction at B if the ladder is on the verge of slipping. B Smooth wall 15 ft. Hg = 0.3 %3D A N(b) = 7.5, 0=59.04° N(b) = 5.5, 0=55.04°

PROBLEM 3 The uniform 25 lb-f ladder in the figure below rests against the smooth wall at B, and the end A rests on the rough horizontal plane with coefficient of friction shown in the figure. Determine the angle of inclination (theta) of the ladder and the normal reaction at B if the ladder is on the verge of slipping. B Smooth wall 15 ft. Hg = 0.3 %3D A N(b) = 7.5, 0=59.04° N(b) = 5.5, 0=55.04°

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

Fluid Mechanics Motor oil (SAE 10W-30) flows between two parallel plates 6cm apart (B=6cm) at 38oC under a pressure gradient dp/dx of -1.5kN/m3 with a velocity distribution as shown by the blue curve in the picture, and given by: u(y)=-1/2mu dp/dx (By-y2) What are the velocity and shear stress at the wall; a distance of 10 mm from the wall?
Determine the magnitude of the reaction at the bottom of the ladder. The top of the 15kg ladder is leaning against a very smooth vertical wall. Assume thatbthe mass center of the painter is directly above his feet and that the coefficient of friction between the horizontak ground and ladder is 0.25
Statics Please help Consider the ladder with dimensions to the right. It has a mass of 10 kg concentrated in the middle of the ladder. The friction between the ladder and the and ground and the ladder and the wall is ???? = 0.2. a.) Determine the minimum angle theta where the ladder does not slip.
I WILL RATE! 1. What is the Horizontal Reaction at A? A. 0 B. 10 kN (to the right) C. 10 kN (to the left) D. 5 kN (to the left) 2. What is the Vertical Reaction at A? A. 11.67 kN upwardsB. 20.33 kN upwardsC. 32 kN upwardsD. 8 kN downwards 3. What is the Vertical Reaction at H? A. 20.33 kN upwardB. 11.67 kN upwardC. 32 kN upwardD. 8 kN downward 4. What is the Vertical Deflection at F? A. 2.74 mm downwardB. 0.42 mm downwardC. 0.36 mm upwardD. 1.17 mm upward
The cylinder of weight, W, shown below is being hoisted up with the force F against the vertical wall. If us = 0.57 a. Determine the reaction force (resultant of normal force and frictional force) against the vertical wall. b. Calculate the force, F, needed to set the cylindrical roller in motion W or W1 (in kN) = 516
The 100-lb boy at A is suspended from the cable that passes over the quarter circular cliff rock. What horizontal force must the woman at A exert on the cable in order to let the boy descend at constant velocity? The coefficients of static and kinetic friction between the cable and the rock are μs = 0.4 and μk = 0.35, respectively.
Find the following: - Righting Moment - Overturning Moment - Factor of Safety Against Sliding - Factor of Safety Again Overturning Given: μ = 0.6 γ = 23.50 kN/m^3 b1 = 1.60 m b2 = 4.00 m h1 = 10.00 m h2 = 8.00 m
Two blocks A and B have a weight of 11 lb and 5 lb , respectively. They are resting on the incline for which the coefficients of static friction are μA = 0.16 and μB = 0.25. Determine the angle θ which will cause motion of one of the blocks. What is the friction force under each of the blocks when this occurs? The spring has a stiffness of k = 2 lb/ft and is originally unstretched. Determine the smallest angle and determine the friction force under block A and B under this angle.
From the given figure. Determine the location of lateral force from the base of the wall in meters.
A uniform ladder 5 m long and weighing 80N rests against on a vertical wall at B and one end at A (on the ground.) The angle friction at all contact surfaces is 21.8°. Fiind the smallest angle at which ladder can be inclined with the horizontal before it is on its verge of slipping.
A cylindrical caisson having an outside diameter of 7m floats in sea water sg=1.03 with its axis vertical and its lower end submerged 6m below the water surface. If its center of gravity is on the vertical axis and is 3m above the sea water surface. a. Determine the value of MBO, in meters b.Find the true metacentric height in meters is the caisson stable? c. find the restoring or upsetting couple, in kN-m, when the caisson is tipped through an angle of 9degree.
A heavy cable with a mass of 12 kg/m passes over the two fixed pipes 300 m apart on thesame level. One end supports a 1600 kg cylinder. It is found experimentally that a downwardforce P of 60 kN is required to induce slipping of the cable over both pipes at a constant rate.Determine the coefficient of kinetic friction between the cable and the pipes, the maximumtension T in the cable between the pipes, and the sag h in the cable.