Elasticity Concepts

What is Young's Modulus?

• Young's Modulus is a unit of electrical conductivity.

• Young's Modulus is a measure of the density of a material.

• Young's Modulus measures the temperature resistance of a material.

• Young's Modulus is a measure of the stiffness of a material.

State Hooke's Law.

• F = ax

• F = -kx

• F = kx

• F = mx

Explain the Stress-Strain Curve.

• The stress-strain curve is a mathematical equation used to calculate volume changes.

• The stress-strain curve shows the relationship between stress and strain for a material, including regions like elastic and plastic deformation.

• The stress-strain curve is used to measure temperature changes in materials.

• Stress-strain curve only applies to liquids, not solids.

Define Elastic Limit.

• Maximum stress causing immediate fracture

• Minimum stress causing permanent deformation

• Point where stress is zero

• Maximum stress without permanent deformation

What is the formula for Young's Modulus?

• Pressure / Volume

• Stress / Strain

• Density / Velocity

• Force / Area

How is Hooke's Law represented mathematically?

• F = kx

• F = mx

• F = ax

• F = k/m

What are the key points on a Stress-Strain Curve?

• Fracture Point

• Plastic Limit

• Critical Point

• Proportional Limit, Elastic Limit, Yield Point, Ultimate Strength, Rupture Point

How is Elastic Limit determined?

• By conducting stress-strain testing and identifying the point at which plastic deformation begins.

• By consulting a horoscope

• By asking a magic eight ball

• By flipping a coin and guessing

What are the units of Young's Modulus?

• Pascals (Pa) or Newtons per square meter (N/m^2)

• Meters (m)

• Kilograms (kg)

• Joules (J)

• Seconds (s)

Why is Hooke's Law only applicable within the elastic limit?

• Hooke's Law is only applicable within the elastic limit because it is based on temperature variations

• Hooke's Law is only applicable within the elastic limit because it is a suggestion, not a law

• Hooke's Law is only applicable within the elastic limit because it was disproven by recent experiments

• Hooke's Law is only applicable within the elastic limit because beyond this limit, the material undergoes permanent deformation.