Final answer:
Young's modulus of elasticity, measured in pascals, is the ratio of stress to strain for materials under tensile or compressive forces, representing material stiffness.
Step-by-step explanation:
Young's modulus of elasticity, measured in pascals (Pa), represents the ratio of stress to strain in a material when it is subjected to tensile (or compressive) forces. The correct answer to your question is A) Stress on strain (PL on eA). Stress is the force causing deformation of a material divided by the area to which the force is applied, while strain is the deformation (change in length) divided by the original length of the material. Young's modulus is a measure of the stiffness of a material; a higher modulus indicates that greater stress is required to produce a given amount of strain. It's a fundamental property used in engineering and construction to predict how materials will behave under different forces.
When external forces act on an object, they cause it to deform. The elastic modulus, including Young's modulus, bulk modulus, and shear modulus, describes how the deformation relates to the applied force. It's important to note that the relation between stress and strain is observed and measured, allowing for these properties to be tabulated for engineering use. Young's modulus is particularly relevant for tensile or compressive stress and strain, providing key information on how a material will stretch or compress under such conditions.