Which of the following statement is correct?a)The stress is the press...
Stress = force per unit area, i.e. F / A or N/m2Strain = change in length per unit original length, i.e. m/m or mm/mm.
Hooke’s Law holds good up to the proportional limit.
According to Hooke’s Law, stress is directly proportional to strain within the elastic limit.
Note: Stress is not pressure per unit area because pressure itself is force per unit area.
View all questions of this test
Which of the following statement is correct?a)The stress is the press...
Explanation:
Stress and Strain:
Stress and strain are two important mechanical properties of materials. Stress is the force acting per unit area on a material, while strain is the change in shape or size of a material due to stress. Stress is denoted by σ and strain is denoted by ε.
Hooke's Law:
Hooke's law states that stress is directly proportional to strain within an elastic limit. This means that when a material is subjected to stress, it will deform or change shape, but it will return to its original shape when the stress is removed, as long as the stress is within a certain limit. This limit is known as the elastic limit.
Breaking Point:
If the stress exceeds the elastic limit, the material will continue to deform even when the stress is removed. This is known as plastic deformation. If the stress is too high, the material will eventually break.
Correct statement:
Therefore, the correct statement is that stress is directly proportional to strain within an elastic limit (option D). This is an important concept in the study of materials and is used to understand how materials behave under stress and how they can be designed to withstand different types of loads.