Question

Which of the following statements is correct?

• A. Stress is proportional to strain.
• B. Stress is force per unit area.
• C. Within elastic limit, the ratio of stress to strain is called Young's modulus.
• D. All of the above

Answer 1

Answer:

D. All of the above

Stress is force per unit area, strain is the measure of deformation experienced by a body. Hooke's law states that stress is directly proportional to strain within the proportionality limit. Young's modulus of elasticity is the constant of proportionality. The stress-strain curve gives the relationship between stress and strain. The limit of proportionality is the stress at which the curve ceases to be a straight line. The elastic limit is that point up to which the material remains elastic.