Podcast
Questions and Answers
What does the area, $A$, represent in the Young's modulus equation $Y = \frac{FL}{A\Delta L}$?
What does the area, $A$, represent in the Young's modulus equation $Y = \frac{FL}{A\Delta L}$?
- The change in length of the material.
- The cross-sectional area of the material. (correct)
- The force applied to the material.
- The original length of the material.
If a wire's radius is doubled, how does this affect the stress experienced under the same applied force?
If a wire's radius is doubled, how does this affect the stress experienced under the same applied force?
- Stress is quadrupled.
- Stress is reduced to one-quarter. (correct)
- Stress remains the same.
- Stress is doubled.
A metal rod is subjected to a tensile force. Which of the following changes would result in the greatest increase in strain?
A metal rod is subjected to a tensile force. Which of the following changes would result in the greatest increase in strain?
- Decreasing the rod's original length.
- Increasing the rod's cross-sectional area.
- Decreasing the applied force.
- Increasing the rod's original length. (correct)
What does 'B' represent in the equation $B = -P/(\Delta V/V)$?
What does 'B' represent in the equation $B = -P/(\Delta V/V)$?
A material with a high Young's modulus is most accurately described as:
A material with a high Young's modulus is most accurately described as:
In the context of stress, what does $F$ represent in the equation $\sigma = F/A$?
In the context of stress, what does $F$ represent in the equation $\sigma = F/A$?
How is 'Strain' defined in relation to a material's deformation?
How is 'Strain' defined in relation to a material's deformation?
If a material experiences a small strain under high stress, what can be inferred about its Young's modulus?
If a material experiences a small strain under high stress, what can be inferred about its Young's modulus?
Which of the following best describes the physical quantity represented by 'Stress'?
Which of the following best describes the physical quantity represented by 'Stress'?
The equation Stress = $\rho$lg is used to calculate stress due to:
The equation Stress = $\rho$lg is used to calculate stress due to:
Flashcards
Young's Modulus
Young's Modulus
A measure of a material's stiffness, representing the ratio of stress to strain.
Stress (σ)
Stress (σ)
Force applied per unit area on a material.
Strain
Strain
The fractional change in length (ΔL/L) of a material under stress.
Young's Modulus Formula
Young's Modulus Formula
Signup and view all the flashcards
Bulk Modulus (B)
Bulk Modulus (B)
Signup and view all the flashcards
Stress Formula (plg)
Stress Formula (plg)
Signup and view all the flashcards
A = πr²
A = πr²
Signup and view all the flashcards
Study Notes
- Young's Modulus (Y) is defined as: Y = (Force x Length) / (Area x Change in Length) or Y = FL / A∆L.
- Young's Modulus can also be expressed as Stress/Strain.
Stress
- Stress (σ) is calculated as Force (F) per unit Area (A): σ = F/A.
Strain
- Strain is defined as the Change in Length (∆L) divided by the original Length (L): Strain = ∆L/L.
Area
- Area (A) is calculated using the formula: A = πr², where r is the radius.
Bulk Modulus
- Bulk Modulus (B) is defined as: B = -P / (∆V/V), where P is pressure, ∆V is the change in volume, and V is the original volume.
Stress Calculation
- Stress can be calculated as: Stress = ρlg, where ρ is density, l is length, and g is the acceleration due to gravity.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
