A ground retaining wall is shown in Fig. 9–36a. The ground,particularly when wet, can exert a significant force F on thewall. (a) What force produces the torque to keep the wallupright? (b) Explain why the retaining wall in Fig. 9–36bwould be much less likely to overturn than that in Fig. 9–36a.-F(a)(b)FIGURE 9-36 Question 5.

a) The torque is exerted by the weight of the wall; this keeps it upright.

Answered: A ground retaining wall is shown in…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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under what circumstances is it not necessary to consider torque in an equilibrium problem?
5. (A). A simple turnbuckle arrangement is constructed from a 40 mm outside diameter tube threaded internally at each end to take two rods of 25 mm outside diameter with threaded ends. What will be the nominal stresses set up in the tube and the rods, ignoring thread depth, when the turnbuckle cames an axial load of 30 kN? Assuming a sufficient strength of thread, what maximum load can be transmitted by the turnbuckle if the maximum stress is limited to 180 MN/m? [39.2, 61.1 MN/m2, 88.4 kN] 6. (A). A bar ABCD consists of three sections: AB is 25 mm square and 50 mm long, BC is of 20 mm diameter and40 mm long and CD is of 12 mm diameter and 50 mm long. Determine the stress set up in each section of the bar when it is subjected to an axial tensile load of 20 kN. What will be the total extension of the bar under this load? For the bar material, E = 210GN/m?. [32.63.7, 176.8 MN/m²_ 0.062mm]
The uniform 19.0 kg beam below is 6.4 m long and is perfectly balanced about a point 1.4 m from the left end. What is the mass of the block? (Hint: when calculating the torque due to the weight of the beam, consider all of its mass to be located at its center of mass.)
Why is it not possible to sit upright in a chair and rise toyour feet without first leaning forward?
Assume Young’s modulus for bone is 1.40×1010 N/m2 . The bone breaks if stress greater than 1.50 × 109 N/m2 is imposed on it. (i) What is the maximum force that can be exerted on the femur bone in the leg if it has a minimum effective diameter of 2.50 cm? (ii) If this much force is applied compressively, by how much does the 20.0 cm long bone shorten?
A wheelbarrow with w weight of 150N is used to lift a load with a weight of 900 N. The length from the wheel axle to the center of gravity (COG) of the load is 2 ft, and the distance to the (COG) of the wheelbarrow is 1.5 ft. The length from the wheel axle to the hands is 5 ft. The wheelbarrow is also tilted at an angle of 30 degrees with respect to the horizontal. Calculate the motive force required to hold the wheel barrow
As shown below, on Titan a 96 kg beam of length L is leaning against a frictionless wall and is in static equilibrium. The center of mass of the beam is located 0.8L from the lower end of the beam. 25° 0.8 L Determine the force the wall exerts on the beam and the minimum coefficient of static friction between the floor and the beam. force wall exerts on beam = μs, min =
A person can safely lie on a bed of nails without hurting herself, compared to stepping accidentally on single protruded nail. Explain

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