The pole in the figure is at a 90° bend in a power line and is therefore subjected to more shear force than ones in straight parts of the line. Tow 30° T 80° mm T The tension in each line is 3.80 x 104 N, at the angles shown. The pole is 15.0 m tall, has an 17.0 cm diameter, and can be considered to have half the strength of hardwood. 90° (a) Calculate the compression of the pole (in mm). 0.581 (b) Find how much it bends (in mm). 3.497 X mm

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Q: Help !! SOLUTION

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A: The expression for young’s modulus of the material is, \Y=FAΔLL0ΔL=FL0AY=mgL0AY

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A: Stress is defined as force per unit area.  σ=FA Where F is a force and A is cross-section area.

Q: in tension

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Q: Please no hand writing solution

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A: If you have any doubt please comment

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Mechanical Properties of Solids

There are three types of matter- solid, liquid and gas. Out of them, solids have a rigid shaped and size. The intermolecular forces of attractions in solids are greatest. Mechanical properties are the physical properties of a material which it shows, when it is provided with certain amount of force or load. These properties are to be kept in mind for various purposes. When a force is applied to an object, the object may or may not get deformed depending upon its elastic property. But every time the object develops a restoring force against the force applied. This is commonly known as stress. If the object changes its dimensions due to the force applied it develops strain ( which is the ratio of change in dimension to the original dimension).