7. Deformation is referred to as e a Whenever a force is applied to a body, it w

Question

7. Deformation is referred to as e a Whenever a force is applied to a body, it will send to change the body's shape and sine b. A rabber band will undergo a very large c. Deformation of a body can also occur when the d. The e. The vertical line is lengthened, the horicoetal line is shortened, and the inclined line f. All of the above and they may be highly visible or practically slight deformations of structural memibers oocur when a bailding is occupied thermal expansion or contraction of a roof caused by the weather gcometry of any line segment within the body may vary substanialily along its lengh when stretched, whereas otly of the body is changed will not be uniform throughout the body, and so the change in 43 8. What is the unit of strain or deformation? c. Micron d. mm/mm or in /in. or m/m e. no unit A bar is subjected to an axial tensile stress. If the longitudinal strain in the bar is 0.44 times the lateral strain, what is the Poisson's ratio of the material? 9. a. 0.44 b.0.30 c. 0.28 d. None of above length and depth but width is double that of 'A'. The elastic strength (under same load/force of beam 'B' will be as compared to beam A 10. The rectangular beam 'A' has length , width b and depth d. Another beam 'B has the same a. same b. one-half c. one-fourth d. one-eighth

Explanation / Answer

7) f

8) strain has mm/mm or m/m or in/in practically it has no units but the unit of deformation is mm or m or in. strain is defined as deformation per unit length, i think the qstn leads to confusion as both deformation and strain does nt have same units, when the qstn is strain or deformation per unit length then they have same units.

9) a

1/m=-e_d/e_l=-(-0.44 e_l/e_l)=0.44

10) a

E is only a material property and is independent of a geometric property so same elastic modulus

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