EXERCISES & PROBLEMS

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EXERCISES & PROBLEMS ssm Solution is in the Student Solutions Manual. www Solution is available on the World Wide Web at: http://www.wiley.com/col\ege/hrw Ilw Solution is available on the Interactive LeamingWare. Some Examples 01 Static Equilibrium IE. A physics Brady Bunch, whose weights in newtons are indicated , is balanced on a seesaw. What is the number of the […]

Hydraulic Stress

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Hydraulic Stress The stress is the fluid pressure p on the object, which, as you will see in Chapter 15, is a force per unit area. The strain is , where V is the original volume of the specimen and is the absolute value of the change in volume. The corresponding modulus, with symbol B, is called the […]

Shearing

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Shearing In the case of shearing, the stress is also a force per unit area, but the force vector lies in the plane of the area rather than perpendicular to it. The strain is the dimensionless ratio , with the quantities defined.          

Tension and Compression

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Tension and Compression For simple tension or compression, the stress on an object is defined as , where F is the magnitude of the force applied perpendicularly to the area A on the object. The strain, or unit deformation, is then the dimensionless quantity , the fractional (or sometimes percentage) change in the length of the specimen. If […]

Elasticity

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Elasticity When a large number of atoms come together to form a metallic solid, such as an iron nail, they settle  equilibrium Positions in a three-dimensional lattice. a repetitive arrangement in which each atom has a well-defined equilibrium distance from its nearest neighbors. The atoms are held together by inter atomic forces that are modeled as tiny springs. If […]

Indeterminate Structures

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Indeterminate Structures For the problems of this chapter, we have only three independent equations at our disposal, usually two balance of forces equations and one balance of torques equation about a given rotation axis. We have all had experience with a wobbly restaurant table, which we usually level by putting folded paper under one of the legs. If […]

PROBLEM SOLVING TACTICS

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PROBLEM SOLVING TACTIC Here is a list of steps for solving static equilibrium problems: 1. Draw a sketch of the problem. 2. Select the system to which you will apply the laws of equilibrium. drawing a closed curve around it on your sketch to fix it clearly in your mind. 3. Draw e free-body diagram of the […]

Sample Problem

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Sample Problem Shows a safe. of mass M = 430 kg. hanging by a rope from a boom with dimensions a = 1.9 m and b = 2.5 m. The boom consists of a hinged beam and a horizontal cable that connects the beam to a wall. (a) What is the tension in the cable? In other words, […]

Sample Problem

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Sample Problem A ladder of length L = 12 m and mass m = 45 kg leans against a slick (friction less) wall. Its upper end is at height h = 9.3 m above the pavement on which the lower end rests (the pavement is not friction less). The ladder’s center of mass is L/3 from the lower end. A […]

Sample Problem

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Sample Problem A uniform beam, of length L and mass 11/ = 1.8 kg. is at rest with its ends on two scales. A uniform block. with mass M = ~.7 kg. is at rest on the beam. with its center a distance , from the beam’s left end, What do the scales read? SOLUTION :The first steps in […]