Lesson 3.4.2.1

3.4.2.1 Bulk properties of solids Quiz: AQA Physics, Unit 4

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson 3.4.2.1, Bulk properties of solids: 20 multiple choice questions for the AQA Physics (7408), Unit 4: Mechanics and materials, written with Revision Ninja.

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The 20 questions

  1. Which expression defines the density of a material?

    • Mass per volume
    • Volume per mass
    • Mass times volume
    • Force per area

  2. According to Hooke's law, extension is directly proportional to which variable?

    • Cross-sectional area
    • Applied force
    • Tensile stress
    • Original length

  3. What is the SI unit for the spring constant k?

    • N m^2
    • N m^-2
    • N m^-1
    • N m

  4. What physical quantity is defined as force per unit cross-sectional area?

    • Spring constant
    • Tensile stress
    • Tensile strain
    • Young modulus

  5. What physical quantity is defined as extension divided by original length?

    • Tensile stress
    • Stiffness
    • Young modulus
    • Tensile strain

  6. Which type of material breaks suddenly with negligible plastic deformation?

    • Malleable
    • Brittle
    • Ductile
    • Elastic

  7. Beyond which point on a force-extension graph does permanent deformation occur?

    • Yield point
    • Elastic limit
    • Breaking stress
    • Limit of proportionality

  8. A spring extends by 4.0 cm when a 20 N force is applied. What is its spring constant?

    • 50 N m^-1
    • 0.002 N m^-1
    • 500 N m^-1
    • 5000 N m^-1

  9. A block measures 4.0 cm by 5.0 cm by 10 cm and has mass 1.2 kg. What is its density?

    • 2400 kg m^-3
    • 6000 kg m^-3
    • 60 kg m^-3
    • 600 kg m^-3

  10. A spring with k = 500 N/m is extended by 0.060 m. What elastic energy is stored?

    • 0.9 J
    • 30 J
    • 0.45 J
    • 1.8 J

  11. A steel wire of radius 0.50 mm carries a tensile force of 20 N. What is the tensile stress?

    • about 40 MPa
    • about 250 MPa
    • about 25 MPa
    • about 2.5 MPa

  12. A force increases steadily from 0 to 12 N as a spring extends by 0.30 m, obeying Hooke's law. What energy is stored?

    • 3.6 J
    • 12 J
    • 0.9 J
    • 1.8 J

  13. Under equal force, how does extension of a 100 N m^-1 spring compare to a 400 N m^-1 spring?

    • Half as great
    • Four times smaller
    • Twice as great
    • Four times greater

  14. What happens to a material loaded beyond its elastic limit after unloading?

    • Fractures immediately
    • Retains permanent extension
    • Increases in stiffness
    • Returns to original

  15. A metal cube has a mass of 80 g and a volume of 8.0 cm^3. What is its density?

    • 6.4 g cm^-3
    • 40 g cm^-3
    • 0.1 g cm^-3
    • 10 g cm^-3

  16. A wire obeys Hooke's law up to a force of 40 N, where its extension is 8.0 mm. How much elastic energy is stored at 40 N?

    • 0.40 J
    • 0.08 J
    • 0.32 J
    • 0.16 J

  17. How does doubling the cross-sectional area of a wire affect its tensile stress under equal force?

    • Quadruples the stress
    • Has no effect
    • Halves the stress
    • Doubles the stress

  18. A spring with k = 250 N/m is stretched by 0.20 m and then releases stored energy into a 0.10 kg mass that rises vertically (g = 9.8 m/s^2). What is the maximum height gained, assuming all energy becomes gravitational potential energy?

    • 2.5 m
    • 5.1 m
    • 50 m
    • 10.2 m

  19. Which property describes a material that undergoes large plastic deformation before fracturing?

    • Hardness
    • Stiffness
    • Ductility
    • Brittleness

  20. What quantity is represented by the total area under a force-extension graph before fracture?

    • Breaking stress
    • Tensile strain
    • Young modulus
    • Energy absorbed

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