Questions from Mechanics


Q: A bar of length 2.0 m is made of a

A bar of length 2.0 m is made of a structural steel having the stress-strain diagram shown in the figure. The yield stress of the steel is 250 MPa, and the slope of the initial linear part of the stre...

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Q: A bar made of structural steel having the stress-strain diagram

A bar made of structural steel having the stress-strain diagram shown in the figure has a length of 48 in. The yield stress of the steel is 42 ksi, and the slope of the initial linear part of the stre...

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Q: A suspender on a suspension bridge consists of a cable that passes

A suspender on a suspension bridge consists of a cable that passes over the main cable (see figure) and supports the bridge deck, which is far below. The suspender is held in position by a metal tie t...

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Q: A circular bar of magnesium alloy is 750 mm long. The

A circular bar of magnesium alloy is 750 mm long. The stress-strain diagram for the material is shown in the figure. The bar is loaded in tension to an elongation of 6.0 mm, and then the load is remov...

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Q: An aluminum bar has length L = 6 ft and diameter d

An aluminum bar has length L = 6 ft and diameter d = 1.375 in. The stress-strain curve for the aluminum is shown in Fig. 1-34. The initial straight line part of the curve has a slope (modu...

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Q: A continuous cable (diameter 6 mm) with tension force T

A continuous cable (diameter 6 mm) with tension force T is attached to a horizontal frame member at B and C to support a sign structure. The cable passes over a small frictionless pulley at D. The wir...

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Q: A wire of length L = 4 ft and diameter d = 

A wire of length L = 4 ft and diameter d = 0.125 in. is stretched by tensile forces P = 600 lb. The wire is made of a copper alloy having a stress strain relationship that may...

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Q: A steel riser pipe hangs from a drill rig located offshore in

A steel riser pipe hangs from a drill rig located offshore in deep water. (a) What is the greatest length (meters) it can have without breaking if the pipe is suspended in the air and the ultimate str...

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Q: Three different materials, designated A, B, and C,

Three different materials, designated A, B, and C, are tested in tension using test specimens having diameters of 0.505 in. and gage lengths of 2.0 in. (see figure). At failure, the distances between...

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Q: The strength-to-weight ratio of a structural material is

The strength-to-weight ratio of a structural material is defined as its load-carrying capacity divided by its weight. For materials in tension, use a characteristic tensile stress obtained from a stre...

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