# 9702/13 October/November 2018

> 9702/13 October/November 2018: 40 questions, 40 marks. Difficulty 0.32, deviation 0.17, algebraic 0.24, text density 0.27. CIE IAL Physics 9702 P1.

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CIE IAL · Physics · 2018 October/November

This Physics 9702 Paper 1 (Multiple Choice) paper contains 40 questions worth 40 marks. The profile below reports five mark-weighted difficulty and complexity measures, and every question row repeats them. Full question text and mark scheme open in the Interactive Practice Hub.

- CIE IAL
- 9702 P1
- 40 questions
- 40 marks
- Free paper
- [Practise this paper](https://www.examsci.com/practice?set_id=b5cddb1e-7c97-4ebd-a686-1dca1e40caf4)
- [All 9702 P1 papers](https://www.examsci.com/past-papers/cie-ial/physics/9702-paper-1/)

Core finding

**9702/13 October/November 2018 is a past paper for CIE IAL Physics 9702 Paper 1 (Multiple Choice), with 40 questions worth 40 marks.** Its mark-weighted Difficulty Measure is 0.32 on a 0.20–0.75 scale, with a Difficulty Deviation of 0.17 and a mark split of 60.0% Easy, 32.5% Medium and 7.5% Hard. Algebraic complexity averages 0.24; text density and modelling average 0.27. All five measures use 40 part-level tags, not candidate results. Every question row below repeats them and opens the Interactive Practice Hub for that question.

## Difficulty & complexity profile

All five measures are mark-weighted and calculated from 40 parts carrying 40 part marks. Difficulty tags cover 40 parts, algebraic tags 40 and text-density tags 40. Tags are internal metadata, not official exam-board ratings.

- **Difficulty Measure**: 0.32 — 0.20–0.75 · nearer Easy
- **Difficulty Deviation**: 0.17 — 0 = uniform; higher = more mixed
- **Difficulty Ratio**: 60.0 / 32.5 / 7.5 — % Easy / Medium / Hard
- **Algebraic Complexity Measure**: 0.24 — 0.20–0.75 · nearer Low
- **Text Density and Modelling Measure**: 0.27 — 0.20–0.75 · nearer Low

Scale: Easy 0.20 · Medium 0.45 · Hard 0.75, and Low 0.20 · Medium 0.45 · High 0.75 for the two complexity measures. [How each band is defined and how the values are calculated →](https://www.examsci.com/guides/difficulty-and-complexity-measures/)

### Definitions and calculation

| Measure | Paper value | Formula |
| --- | --- | --- |
| **Difficulty Measure** | 0.32 | Σ(d_i × w_i) / Σw_i, with d = 0.20 / 0.45 / 0.75 |
| **Difficulty Deviation** | 0.17 | √(Σw_i(d_i − μ)^2 / Σw_i) |
| **Difficulty Ratio** | 60.0% Easy / 32.5% Medium / 7.5% Hard | marks in band / all tagged marks |
| **Algebraic Complexity Measure** | 0.24 | Σ(c_i × marks_i) / Σmarks_i, with c = 0.20 / 0.45 / 0.75 |
| **Text Density and Modelling Measure** | 0.27 | Σ(t_i × marks_i) / Σmarks_i, with t = 0.20 / 0.45 / 0.75 |

w_i equals the part marks, except for a Hard part worth 4 or more marks, where w_i = marks^0.75 to offset the accessible starter steps inside long structured questions.

## Question list

Each measure is recalculated from the parts of that question and uses the same weights as the paper profile.

| Question | Topic | Marks | Difficulty Measure | Algebraic Complexity Measure | Text Density and Modelling Measure | Practice |
| --- | --- | --- | --- | --- | --- | --- |
| **Q1** FRQ | [1.1 Physical quantities](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/physical-quantities/) | 1 | 0.20 Easy | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b5cddb1e-7c97-4ebd-a686-1dca1e40caf4&question_id=72b427d5-8a67-42ae-9972-487e2f2a8574&source_detail=9702%2F13+October%2FNovember+2018) |
| **Q2** FRQ | [1.2 SI units](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/si-units/) | 1 | 0.20 Easy | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b5cddb1e-7c97-4ebd-a686-1dca1e40caf4&question_id=ae937d26-3d1b-4cec-a0ab-3321f614c772&source_detail=9702%2F13+October%2FNovember+2018) |
| **Q3** FRQ | [1.4 Scalars and vectors](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/scalars-and-vectors/) | 1 | 0.20 Easy | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b5cddb1e-7c97-4ebd-a686-1dca1e40caf4&question_id=30693c09-69a9-44f7-bb0d-867c53826e62&source_detail=9702%2F13+October%2FNovember+2018) |
| **Q4** FRQ | [2.1 Measurements](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/) | 1 | 0.20 Easy | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b5cddb1e-7c97-4ebd-a686-1dca1e40caf4&question_id=a654449e-b30d-4f5d-a86a-847f81f36a32&source_detail=9702%2F13+October%2FNovember+2018) |
| **Q5** FRQ | [2.2 Errors and uncertainties](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/errors-and-uncertainties/) | 1 | 0.45 Medium | 0.45 Medium | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b5cddb1e-7c97-4ebd-a686-1dca1e40caf4&question_id=52029d58-0c09-4049-ac19-f19933781562&source_detail=9702%2F13+October%2FNovember+2018) |
| **Q6** FRQ | [3.1 Equations of motion](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/equations-of-motion/) | 1 | 0.20 Easy | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b5cddb1e-7c97-4ebd-a686-1dca1e40caf4&question_id=24b08e7a-70cc-46cc-a714-fe1a25822bdd&source_detail=9702%2F13+October%2FNovember+2018) |
| **Q7** FRQ | [4.1 Momentum and Newton’s laws of motion](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/momentum-and-newton-s-laws-of-motion/) | 1 | 0.20 Easy | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b5cddb1e-7c97-4ebd-a686-1dca1e40caf4&question_id=09caca16-213d-4463-98b4-16ae2cce669a&source_detail=9702%2F13+October%2FNovember+2018) |
| **Q8** FRQ | [3.1 Equations of motion](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/equations-of-motion/) | 1 | 0.20 Easy | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b5cddb1e-7c97-4ebd-a686-1dca1e40caf4&question_id=bbc95e50-adb4-4579-9472-4321361439d7&source_detail=9702%2F13+October%2FNovember+2018) |
| **Q9** FRQ | [4.2 Non-uniform motion](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/non-uniform-motion/) | 1 | 0.45 Medium | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b5cddb1e-7c97-4ebd-a686-1dca1e40caf4&question_id=61034afc-bd00-4e6b-8213-e0ad74464af2&source_detail=9702%2F13+October%2FNovember+2018) |
| **Q10** FRQ | [4.1 Momentum and Newton’s laws of motion](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/momentum-and-newton-s-laws-of-motion/) | 1 | 0.20 Easy | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b5cddb1e-7c97-4ebd-a686-1dca1e40caf4&question_id=e13acb56-0552-4132-9b22-c4887132dbcf&source_detail=9702%2F13+October%2FNovember+2018) |
| **Q11** FRQ | [5.1 Types of force](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/) | 1 | 0.45 Medium | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b5cddb1e-7c97-4ebd-a686-1dca1e40caf4&question_id=c91143ec-78f6-46ac-b798-129f1edfaf74&source_detail=9702%2F13+October%2FNovember+2018) |
| **Q12** FRQ | [5.2 Turning effects of forces](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/turning-effects-of-forces/) | 1 | 0.45 Medium | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b5cddb1e-7c97-4ebd-a686-1dca1e40caf4&question_id=2f333c8f-ebde-4afc-b3cf-7e53c17ed01c&source_detail=9702%2F13+October%2FNovember+2018) |
| **Q13** FRQ | [5.3 Equilibrium of forces](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/equilibrium-of-forces/) | 1 | 0.75 Hard | 0.45 Medium | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b5cddb1e-7c97-4ebd-a686-1dca1e40caf4&question_id=99b76621-229d-4254-a177-41076a6acdda&source_detail=9702%2F13+October%2FNovember+2018) |
| **Q14** FRQ | [5.4 Density and pressure](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/density-and-pressure/) | 1 | 0.20 Easy | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b5cddb1e-7c97-4ebd-a686-1dca1e40caf4&question_id=f531cec7-b9a4-4c84-839f-ceb4d604c5f5&source_detail=9702%2F13+October%2FNovember+2018) |
| **Q15** FRQ | [6.1 Energy conversion and conservation](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/) | 1 | 0.20 Easy | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b5cddb1e-7c97-4ebd-a686-1dca1e40caf4&question_id=bc18daab-9379-4362-8c29-96019aba9b9c&source_detail=9702%2F13+October%2FNovember+2018) |
| **Q16** FRQ | [6.2 Work and efficiency](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/) | 1 | 0.20 Easy | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b5cddb1e-7c97-4ebd-a686-1dca1e40caf4&question_id=8f54546e-e85f-4ba3-bc15-e4b4ed7fc9df&source_detail=9702%2F13+October%2FNovember+2018) |
| **Q17** FRQ | [6.2 Work and efficiency](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/) | 1 | 0.20 Easy | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b5cddb1e-7c97-4ebd-a686-1dca1e40caf4&question_id=77c4415f-4a0f-45c7-90f3-b27d9d136c8e&source_detail=9702%2F13+October%2FNovember+2018) |
| **Q18** FRQ | [6.4 Power](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/) | 1 | 0.20 Easy | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b5cddb1e-7c97-4ebd-a686-1dca1e40caf4&question_id=040e54f5-c011-4a07-ad4b-6687e84f1420&source_detail=9702%2F13+October%2FNovember+2018) |
| **Q19** FRQ | [9.1 Stress and strain](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/stress-and-strain/) | 1 | 0.75 Hard | 0.45 Medium | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b5cddb1e-7c97-4ebd-a686-1dca1e40caf4&question_id=a268e7ae-9983-44cb-a8e7-08c23c564ce5&source_detail=9702%2F13+October%2FNovember+2018) |
| **Q20** FRQ | [9.2 Elastic and plastic behaviour](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/elastic-and-plastic-behaviour/) | 1 | 0.20 Easy | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b5cddb1e-7c97-4ebd-a686-1dca1e40caf4&question_id=062accad-ee06-471d-bbdf-25c52696c1b0&source_detail=9702%2F13+October%2FNovember+2018) |
| **Q21** FRQ | [14.1 Progressive waves](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/progressive-waves/) | 1 | 0.20 Easy | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b5cddb1e-7c97-4ebd-a686-1dca1e40caf4&question_id=4b2f2fae-b8e3-47ef-a163-9e25c2a2ca97&source_detail=9702%2F13+October%2FNovember+2018) |
| **Q22** FRQ | [14.2 Transverse and longitudinal waves](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/transverse-and-longitudinal-waves/) | 1 | 0.45 Medium | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b5cddb1e-7c97-4ebd-a686-1dca1e40caf4&question_id=f2395781-2106-4416-8e60-a4c1c1954c73&source_detail=9702%2F13+October%2FNovember+2018) |
| **Q23** FRQ | [14.3 Determination of frequency and wavelength of sound waves](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/) | 1 | 0.45 Medium | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b5cddb1e-7c97-4ebd-a686-1dca1e40caf4&question_id=d46bcbb9-fd52-420a-8d6f-d1fc65af3ef6&source_detail=9702%2F13+October%2FNovember+2018) |
| **Q24** FRQ | [14.4 Doppler effect](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/) | 1 | 0.45 Medium | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b5cddb1e-7c97-4ebd-a686-1dca1e40caf4&question_id=d1f16488-6c8f-497f-babd-104ae818a118&source_detail=9702%2F13+October%2FNovember+2018) |
| **Q25** FRQ | [14.5 Electromagnetic spectrum](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/electromagnetic-spectrum/) | 1 | 0.20 Easy | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b5cddb1e-7c97-4ebd-a686-1dca1e40caf4&question_id=93091330-b899-460b-8a9d-a65af963f0af&source_detail=9702%2F13+October%2FNovember+2018) |
| **Q26** FRQ | [15.1 Stationary waves](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/stationary-waves/) | 1 | 0.45 Medium | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b5cddb1e-7c97-4ebd-a686-1dca1e40caf4&question_id=5fc1c3a9-b7ea-4679-b231-ef1c4115197a&source_detail=9702%2F13+October%2FNovember+2018) |
| **Q27** FRQ | [15.2 Diffraction](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/diffraction/) | 1 | 0.20 Easy | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b5cddb1e-7c97-4ebd-a686-1dca1e40caf4&question_id=f789db23-44bb-4e58-b9a4-3e5b82d469a5&source_detail=9702%2F13+October%2FNovember+2018) |
| **Q28** FRQ | [15.3 Interference, two-source interference](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/) | 1 | 0.20 Easy | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b5cddb1e-7c97-4ebd-a686-1dca1e40caf4&question_id=941e7fda-11a6-43a7-9be0-53281f604ba7&source_detail=9702%2F13+October%2FNovember+2018) |
| **Q29** FRQ | [15.4 Diffraction gratings](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/) | 1 | 0.45 Medium | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b5cddb1e-7c97-4ebd-a686-1dca1e40caf4&question_id=1f5c8da8-a684-4748-a7fb-f9829d0319aa&source_detail=9702%2F13+October%2FNovember+2018) |
| **Q30** FRQ | [17.1 Concept of an electric field](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/) | 1 | 0.20 Easy | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b5cddb1e-7c97-4ebd-a686-1dca1e40caf4&question_id=e0653154-27d4-4ee9-922f-71916ba010a7&source_detail=9702%2F13+October%2FNovember+2018) |
| **Q31** FRQ | [17.2 Uniform electric fields](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/) | 1 | 0.45 Medium | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b5cddb1e-7c97-4ebd-a686-1dca1e40caf4&question_id=70b5e674-9509-4ec0-851a-5b73cb26aa01&source_detail=9702%2F13+October%2FNovember+2018) |
| **Q32** FRQ | [19.1 Electric current](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/electric-current/) | 1 | 0.20 Easy | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b5cddb1e-7c97-4ebd-a686-1dca1e40caf4&question_id=23f98074-22f3-4f79-9deb-fdf8c4d966c2&source_detail=9702%2F13+October%2FNovember+2018) |
| **Q33** FRQ | [19.2 Potential difference and power](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/potential-difference-and-power/) | 1 | 0.75 Hard | 0.45 Medium | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b5cddb1e-7c97-4ebd-a686-1dca1e40caf4&question_id=5d09119a-f5ca-4f01-97a9-d1afba6e8ba0&source_detail=9702%2F13+October%2FNovember+2018) |
| **Q34** FRQ | [19.3 Resistance and resistivity](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/resistance-and-resistivity/) | 1 | 0.20 Easy | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b5cddb1e-7c97-4ebd-a686-1dca1e40caf4&question_id=863e3b93-31cb-462e-81a4-6cb24014f321&source_detail=9702%2F13+October%2FNovember+2018) |
| **Q35** FRQ | [20.1 Practical circuits](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/practical-circuits/) | 1 | 0.45 Medium | 0.45 Medium | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b5cddb1e-7c97-4ebd-a686-1dca1e40caf4&question_id=77bd880d-b6bb-45b8-9a71-da3db0efdf39&source_detail=9702%2F13+October%2FNovember+2018) |
| **Q36** FRQ | [20.2 Kirchhoff’s laws](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/kirchhoff-s-laws/) | 1 | 0.45 Medium | 0.45 Medium | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b5cddb1e-7c97-4ebd-a686-1dca1e40caf4&question_id=1658ad0c-785f-476b-844c-fb854431d053&source_detail=9702%2F13+October%2FNovember+2018) |
| **Q37** FRQ | [20.3 Potential dividers](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/potential-dividers/) | 1 | 0.45 Medium | 0.45 Medium | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b5cddb1e-7c97-4ebd-a686-1dca1e40caf4&question_id=8066ab68-847d-4920-889e-cf55ebcb7333&source_detail=9702%2F13+October%2FNovember+2018) |
| **Q38** FRQ | [26.1 Atoms, nuclei and radiation](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/atoms-nuclei-and-radiation/) | 1 | 0.20 Easy | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b5cddb1e-7c97-4ebd-a686-1dca1e40caf4&question_id=a7755319-3bbf-4ea6-a1b6-2da2e2550a11&source_detail=9702%2F13+October%2FNovember+2018) |
| **Q39** FRQ | [26.1 Atoms, nuclei and radiation](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/atoms-nuclei-and-radiation/) | 1 | 0.20 Easy | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b5cddb1e-7c97-4ebd-a686-1dca1e40caf4&question_id=7f1a8fe1-df1a-4c7c-8b51-36a82012324e&source_detail=9702%2F13+October%2FNovember+2018) |
| **Q40** FRQ | [26.2 Fundamental particles](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/fundamental-particles/) | 1 | 0.20 Easy | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=b5cddb1e-7c97-4ebd-a686-1dca1e40caf4&question_id=e90d7316-ce3d-4c11-a9fe-f681d22164e5&source_detail=9702%2F13+October%2FNovember+2018) |

## Topics in this paper

- [1.1 Physical quantities](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/physical-quantities/)
- [14.5 Electromagnetic spectrum](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/electromagnetic-spectrum/)
- [1.2 SI units](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/si-units/)
- [1.4 Scalars and vectors](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/scalars-and-vectors/)
- [2.1 Measurements](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/)
- [2.2 Errors and uncertainties](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/errors-and-uncertainties/)
- [3.1 Equations of motion](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/equations-of-motion/)
- [4.1 Momentum and Newton’s laws of motion](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/momentum-and-newton-s-laws-of-motion/)
- [4.2 Non-uniform motion](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/non-uniform-motion/)
- [5.1 Types of force](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/)
- [5.2 Turning effects of forces](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/turning-effects-of-forces/)
- [5.3 Equilibrium of forces](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/equilibrium-of-forces/)

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## Paper FAQ

**How are the difficulty and complexity measures calculated?**

Each part is weighted by its official marks. Difficulty uses Easy 0.20, Medium 0.45 and Hard 0.75; algebraic complexity and text density and modelling use Low 0.20, Medium 0.45 and High 0.75. A Hard part worth 4 or more marks is down-weighted to marks^0.75, so the accessible starter steps inside a long structured question do not inflate the difficulty result. This paper's Difficulty Measure is 0.32 from 40 parts.

**What does the Difficulty Deviation show?**

It is the mark-weighted standard deviation of the part difficulty values around the paper mean. A value of 0 would mean every tagged part has the same difficulty; this paper's deviation is 0.17, so its parts are more mixed than a single-level paper.

**Is the Difficulty Ratio based on question counts or marks?**

It is based on official marks, not question counts. This paper's shares are 60.0% Easy, 32.5% Medium and 7.5% Hard; the three shares sum to 100% before rounding.

**Are these official difficulty ratings?**

No. They are derived from the platform's part-level difficulty and static-question-profile tags. They are not exam-board grade boundaries and are not calculated from candidate outcomes. Use them to compare the demand profile of papers, not to predict a grade.

**Why does each question row show its own measures?**

Each row recalculates the same mark-weighted formula from that question's parts. A single-part MCQ therefore shows the tag value directly, while a multi-part structured question blends the tags of its parts using the same Hard-part decay as the paper profile.

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Full page with native tables, bar charts and Practice Hub links: https://www.examsci.com/past-papers/cie-ial/physics/9702-paper-1/2018-october-november-9702-13/