# A linear force-deformation relation is obtained in materials

Q. A linear force-deformation relation is obtained in materials
1. Having elastic stress-strain property
2. Having plastic stress-strain property
3. Following Hooke'ss law
4. Which are rigid elastic materials

## Hook's Lawstates

that the strain in a solid is proportional to the applied stress within the elastic limit of that solid. Linear elastic deformation is governed by Hooke's law, which states:
𝛔 =  E𝛆

Where 𝛔 is the applied stress, E is a material constant called Young's modulus or elastic modulus, and 𝛆 is the resulting strain. This relationship only applies in the elastic range and indicates that the slope of the stress vs. strain curve can be used to find Young's modulus E. Engineers often use this calculation in tensile tests. The elastic range ends when the material reaches its yield strength. At this point, plastic deformation begins.

Note that not all elastic materials undergo linear elastic deformation; some, such as concrete, gray cast iron, and many polymers, respond in a nonlinear fashion. For these materials Hooke's law is inapplicable.

Q. Hooke's law holds good up to

A. yield point
B. plastic limit
C. breaking point
D. None Of the above

The Correct answer is Hook's law holds good up to Elastic Limit  Thanks for reading A linear force-deformation relation is obtained in materials

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