1.23 Hooke’s law region
Hooke’s law applies in the initial straight-line region where extension is directly proportional to applied force up to the limit.
- Syllabus
- 2024
- Objective
- 1.23
- Level
- —
Exam analysis
Chance of appearing14%of analysed past papers
Latest appearanceMay 2024
Most common paperPaper1P
Typical marks1–2
Common command terms
- Draw
- State
- Explain
- Describe
- Sketch
Scoring notes
- Common mistake
- Describing an increasing graph as proportional without checking that the graph is straight.
Recent exam appearances
May 2024Paper1PR [null] · TZ09(b)(i)[ 1 ]1.23 Hooke’s law region
Jan 2023Paper1P [null] · TZ01(b)[ 3 ]1.23 Hooke’s law region
June 2022Paper2PR [null] · TZ07(a)[ 2 ]1.23 Hooke’s law region
May 2020Paper1P [null] · TZ04(a)(ii)[ 2 ]1.23 Hooke’s law region
May 2020Paper1P [null] · TZ04(a)(i)[ 2 ]1.23 Hooke’s law region
Practice this objective
Coverage 2019–2024 · Updated 16 Jul 2026
1.23 Hooke’s law region
Know that the initial linear region of a force-extension graph is associated with Hooke’s law
Concept essentials
- Hooke’s law means extension is directly proportional to force within the valid region.
- The Hooke’s-law region is represented by a straight-line section of a force-extension graph.
- The limit of proportionality marks where the linear relationship stops applying.
- A curved force-extension graph shows that extension is not directly proportional to force.
- A correct Hooke’s-law sketch uses force or load and extension axes with a straight positive-gradient line.