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Stress & Strain - 1 Video Lecture | Physics for JAMB
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FAQs on Stress & Strain - 1 Video Lecture - Physics for JAMB
| 1. What is stress and strain? |  |
| 2. What are the types of stress? | |
Ans. There are three main types of stress:
1. Tensile stress: This occurs when a material is being pulled or stretched, causing it to elongate.
2. Compressive stress: This occurs when a material is being compressed or squeezed, causing it to shorten.
3. Shear stress: This occurs when a material is being subjected to parallel forces in opposite directions, causing it to deform by sliding or twisting.
| 3. How is stress calculated? | |
Ans. Stress is calculated by dividing the applied force by the cross-sectional area of the object. The formula for stress is stress = force / area. The resulting stress is typically expressed in units of pressure, such as pascals (Pa) or pounds per square inch (psi).
| 4. How is strain measured? | |
Ans. Strain is typically measured as the ratio of the change in length or deformation of an object to its original length. It is represented by the symbol ε (epsilon) and is calculated using the formula: strain = change in length / original length. Strain is a dimensionless quantity and is usually expressed as a decimal or a percentage.
| 5. What is the relationship between stress and strain? | |
Ans. The relationship between stress and strain is defined by the material's elastic properties, specifically its Young's modulus or modulus of elasticity. Young's modulus is a measure of how much a material deforms under stress. It is given by the equation: stress = Young's modulus × strain. This relationship allows us to determine the behavior of a material when subjected to external forces.
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