Physics · MECHANICAL PROPERTIES OF SOLIDS

Given below are statements regarding the mechanical properties of solids and their stress-strain behavior: (A) Hooke's law is strictly obeyed throughout the region from the origin up to the yield point (elastic limit). (B) For materials like the tissue of aorta, the elastic region is very large, but the material does not obey Hooke's law over most of the region. (C) If the ultimate tensile strength point and fracture point are far apart on the stress-strain curve, the material is brittle. (D) In the region between the yield point and ultimate tensile strength, removing the applied load results in a permanent set in the material. Choose the correct answer from the options given below:

1. A
   (A) and (D) only
2. B
   (A), (B) and (C) only
3. C
   (B) and (D) only
4. D
   (B), (C) and (D) only