Understanding Stress and Material Properties

Which of the following best describes Hooke's Law?

• Stress is directly proportional to strain.

• Force is directly proportional to displacement.

• Stress is inversely proportional to strain.

• Force is inversely proportional to displacement.

What is the formula for Young's Modulus?

If a material returns to its original shape after the removal of stress, it is said to be:

• Brittle

• Malleable

• Elastic

• Plastic

Which of the following materials is most likely to be brittle?

• Rubber

• Glass

• Copper

• Aluminium

What is the unit of stress in the International System of Units (SI)?

• Pascal (Pa)

• Newton (N)

• Joule (J)

• Watt (W)

Which property measures a material's ability to deform under compressive stress?

• Brittleness

• Malleability

• Elasticity

• Hardness

In a stress-strain graph, what does the slope of the linear portion represent?

• Yield Strength

• Ultimate Strength

• Young's Modulus

• Fracture Point

What is the primary difference between elastic and plastic deformation?

• Elastic deformation is permanent, plastic deformation is temporary.

• Elastic deformation is temporary, plastic deformation is permanent.

• Both are permanent.

• Both are temporary.

Which of the following is NOT a factor affecting Young's Modulus?

• Temperature

• Material Composition

• Length of the Material

• Cross-sectional Area

What is the typical unit for strain?

• Metre (m)

• Newton (N)

• Dimensionless

• Pascal (Pa)