# 9702/12 March 2022

> 9702/12 March 2022: 40 questions, 40 marks. Difficulty 0.29, deviation 0.12, algebraic 0.28, text density 0.31. CIE IAL Physics 9702 P1.

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CIE IAL · Physics · 2022 March

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 the mark scheme require Pro access.

- CIE IAL
- 9702 P1
- 40 questions
- 40 marks
- Pro paper
- [Open in Interactive Practice Hub](https://www.examsci.com/practice?set_id=0b5ead21-a3ad-4a18-9682-8e588f1f22f7)
- [All 9702 P1 papers](https://www.examsci.com/past-papers/cie-ial/physics/9702-paper-1/)

Core finding

**9702/12 March 2022 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 0.29 on a 0.20–0.75 scale, with a Difficulty Deviation of 0.12 and a mark split of 62.5% Easy, 37.5% Medium and 0.0% Hard. Algebraic complexity averages 0.28; text density and modelling average 0.31. 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**: 0.29 — 0.20–0.75 · nearer Easy
- **Difficulty Deviation**: 0.12 — 0 = uniform; higher = more mixed
- **Difficulty Ratio**: 62.5 / 37.5 / 0.0 — % Easy / Medium / Hard
- **Algebraic Complexity Measure**: 0.28 — 0.20–0.75 · nearer Low
- **Text Density and Modelling Measure**: 0.31 — 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** | 0.29 | Σ(d_i × w_i) / Σw_i, with d = 0.20 / 0.45 / 0.75 |
| **Difficulty Deviation** | 0.12 | √(Σw_i(d_i − μ)^2 / Σw_i) |
| **Difficulty Ratio** | 62.5% Easy / 37.5% Medium / 0.0% Hard | marks in band / all tagged marks |
| **Algebraic Complexity Measure** | 0.28 | Σ(c_i × marks_i) / Σmarks_i, with c = 0.20 / 0.45 / 0.75 |
| **Text Density and Modelling Measure** | 0.31 | 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 | [1.2 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=0b5ead21-a3ad-4a18-9682-8e588f1f22f7&question_id=4d81bdf9-8f6c-4dd1-9abf-91546c8f9c4e&source_detail=9702%2F12+March+2022) |
| **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=0b5ead21-a3ad-4a18-9682-8e588f1f22f7&question_id=7624bc24-a517-4158-bbba-d5a044a5a411&source_detail=9702%2F12+March+2022) |
| **Q3** FRQ | [1.3 Errors and uncertainties](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/errors-and-uncertainties/) | 1 | 0.20 Easy | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=0b5ead21-a3ad-4a18-9682-8e588f1f22f7&question_id=0ec59bcc-9501-4faf-a6f1-f47117874ca7&source_detail=9702%2F12+March+2022) |
| **Q4** 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=0b5ead21-a3ad-4a18-9682-8e588f1f22f7&question_id=b3502f55-b51b-46fb-b779-ff3309d8d918&source_detail=9702%2F12+March+2022) |
| **Q5** FRQ | [2.1 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=0b5ead21-a3ad-4a18-9682-8e588f1f22f7&question_id=6b0a4af3-7fa9-419c-8694-55e94ede43cc&source_detail=9702%2F12+March+2022) |
| **Q6** FRQ | [2.1 Equations of motion](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/equations-of-motion/) | 1 | 0.45 Medium | 0.45 Medium | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=0b5ead21-a3ad-4a18-9682-8e588f1f22f7&question_id=2717acb3-d5fc-4c68-9b3f-9998dba67164&source_detail=9702%2F12+March+2022) |
| **Q7** FRQ | [3.1 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 | 0.45 Medium | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=0b5ead21-a3ad-4a18-9682-8e588f1f22f7&question_id=105ee022-1fbf-4901-bae8-ec83820a871d&source_detail=9702%2F12+March+2022) |
| **Q8** FRQ | [3.1 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=0b5ead21-a3ad-4a18-9682-8e588f1f22f7&question_id=93734853-cac5-48ea-8e18-b7cb1ba8b8a3&source_detail=9702%2F12+March+2022) |
| **Q9** FRQ | [3.2 Non-uniform motion](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/non-uniform-motion/) | 1 | 0.20 Easy | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=0b5ead21-a3ad-4a18-9682-8e588f1f22f7&question_id=2ab95b6a-d8fd-4871-bfc0-033e0e681019&source_detail=9702%2F12+March+2022) |
| **Q10** FRQ | [3.3 Linear momentum and its conservation](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/linear-momentum-and-its-conservation/) | 1 | 0.45 Medium | 0.45 Medium | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=0b5ead21-a3ad-4a18-9682-8e588f1f22f7&question_id=30ecffcf-d5ce-4b81-85ef-f0dc03158af0&source_detail=9702%2F12+March+2022) |
| **Q11** FRQ | [4.1 Turning effects of forces](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/turning-effects-of-forces/) | 1 | 0.45 Medium | 0.45 Medium | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=0b5ead21-a3ad-4a18-9682-8e588f1f22f7&question_id=1fc6b128-1478-4f03-a55f-e55d2c2f29fa&source_detail=9702%2F12+March+2022) |
| **Q12** FRQ | [4.1 Turning effects of forces](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/turning-effects-of-forces/) | 1 | 0.45 Medium | 0.45 Medium | 0.75 High | [Go to Practice Hub](https://www.examsci.com/practice?set_id=0b5ead21-a3ad-4a18-9682-8e588f1f22f7&question_id=abdb9d1b-6ed3-4785-81de-64fa93240d43&source_detail=9702%2F12+March+2022) |
| **Q13** FRQ | [4.3 Density and pressure](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/density-and-pressure/) | 1 | 0.20 Easy | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=0b5ead21-a3ad-4a18-9682-8e588f1f22f7&question_id=1447d505-9dab-4c86-8d4f-11ed4847996f&source_detail=9702%2F12+March+2022) |
| **Q14** FRQ | [4.3 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=0b5ead21-a3ad-4a18-9682-8e588f1f22f7&question_id=5ccc784f-cddb-4750-a9e7-a0f638fcdac7&source_detail=9702%2F12+March+2022) |
| **Q15** FRQ | [5.1 Energy conservation](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/energy-conservation/) | 1 | 0.20 Easy | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=0b5ead21-a3ad-4a18-9682-8e588f1f22f7&question_id=892e9e15-dee7-4e4a-b47b-e4057914ea57&source_detail=9702%2F12+March+2022) |
| **Q16** FRQ | [5.1 Energy conservation](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/energy-conservation/) | 1 | 0.45 Medium | 0.45 Medium | 0.75 High | [Go to Practice Hub](https://www.examsci.com/practice?set_id=0b5ead21-a3ad-4a18-9682-8e588f1f22f7&question_id=5e4dcc50-fc91-45bf-9c91-43a90e89bf4e&source_detail=9702%2F12+March+2022) |
| **Q17** FRQ | [5.1 Energy conservation](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/energy-conservation/) | 1 | 0.20 Easy | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=0b5ead21-a3ad-4a18-9682-8e588f1f22f7&question_id=b43e7755-d9fd-4a7f-bc6f-1e73ae5bc3c5&source_detail=9702%2F12+March+2022) |
| **Q18** FRQ | [6.1 Stress and strain](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/stress-and-strain/) | 1 | 0.20 Easy | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=0b5ead21-a3ad-4a18-9682-8e588f1f22f7&question_id=f2e19c99-ff28-4890-bd25-1af9d9e67449&source_detail=9702%2F12+March+2022) |
| **Q19** FRQ | [6.2 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=0b5ead21-a3ad-4a18-9682-8e588f1f22f7&question_id=87403598-4bbe-4e9c-b900-1c67b855c699&source_detail=9702%2F12+March+2022) |
| **Q20** FRQ | [7.1 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=0b5ead21-a3ad-4a18-9682-8e588f1f22f7&question_id=a44fcee6-cf1a-44ca-b1f7-809cbcfc5d4f&source_detail=9702%2F12+March+2022) |
| **Q21** FRQ | [7.1 Progressive waves](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/progressive-waves/) | 1 | 0.45 Medium | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=0b5ead21-a3ad-4a18-9682-8e588f1f22f7&question_id=65ce9ee3-7c7c-4aea-b61b-08141bd63db3&source_detail=9702%2F12+March+2022) |
| **Q22** FRQ | [7.3 Doppler effect for sound waves](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/doppler-effect-for-sound-waves/) | 1 | 0.45 Medium | 0.45 Medium | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=0b5ead21-a3ad-4a18-9682-8e588f1f22f7&question_id=6642ff9b-39c0-4d5f-bc26-97ec1b0284c9&source_detail=9702%2F12+March+2022) |
| **Q23** FRQ | [7.4 Electromagnetic spectrum](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/electromagnetic-spectrum/) | 1 | 0.20 Easy | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=0b5ead21-a3ad-4a18-9682-8e588f1f22f7&question_id=993bf338-1682-4325-bdae-56cb1240e811&source_detail=9702%2F12+March+2022) |
| **Q24** FRQ | [8.1 Stationary waves](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/stationary-waves/) | 1 | 0.20 Easy | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=0b5ead21-a3ad-4a18-9682-8e588f1f22f7&question_id=2ed3a304-6975-4be7-b3b3-a23ab0f89867&source_detail=9702%2F12+March+2022) |
| **Q25** FRQ | [8.1 Stationary waves](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/stationary-waves/) | 1 | 0.45 Medium | 0.45 Medium | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=0b5ead21-a3ad-4a18-9682-8e588f1f22f7&question_id=d92fcfe7-5171-4520-8b41-39aae1793716&source_detail=9702%2F12+March+2022) |
| **Q26** FRQ | [8.2 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=0b5ead21-a3ad-4a18-9682-8e588f1f22f7&question_id=83f15a38-61c8-4870-97a0-8498c0ca8943&source_detail=9702%2F12+March+2022) |
| **Q27** FRQ | [8.3 Interference](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/interference/) | 1 | 0.45 Medium | 0.45 Medium | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=0b5ead21-a3ad-4a18-9682-8e588f1f22f7&question_id=c01b8f79-a605-4333-81b0-1c8b25555d6c&source_detail=9702%2F12+March+2022) |
| **Q28** FRQ | [8.4 The diffraction grating](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/the-diffraction-grating/) | 1 | 0.20 Easy | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=0b5ead21-a3ad-4a18-9682-8e588f1f22f7&question_id=e427424d-adec-4488-94ff-68ae48d0ad69&source_detail=9702%2F12+March+2022) |
| **Q29** FRQ | [9.1 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=0b5ead21-a3ad-4a18-9682-8e588f1f22f7&question_id=68a3a712-888b-4ef7-9c5a-9c69be5b28bf&source_detail=9702%2F12+March+2022) |
| **Q30** FRQ | [9.1 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=0b5ead21-a3ad-4a18-9682-8e588f1f22f7&question_id=1115be7b-a66d-4d56-a0d4-39dfeea74e3e&source_detail=9702%2F12+March+2022) |
| **Q31** FRQ | [9.2 Potential difference and power](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/potential-difference-and-power/) | 1 | 0.45 Medium | 0.45 Medium | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=0b5ead21-a3ad-4a18-9682-8e588f1f22f7&question_id=4287b15f-53f9-467f-91ca-3cf74cadd1d5&source_detail=9702%2F12+March+2022) |
| **Q32** FRQ | [9.3 Resistance and resistivity](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/resistance-and-resistivity/) | 1 | 0.45 Medium | 0.45 Medium | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=0b5ead21-a3ad-4a18-9682-8e588f1f22f7&question_id=bcb0f3b8-dc47-4327-acf2-e746c7ca9e2b&source_detail=9702%2F12+March+2022) |
| **Q33** FRQ | [10.1 Practical circuits](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/practical-circuits/) | 1 | 0.20 Easy | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=0b5ead21-a3ad-4a18-9682-8e588f1f22f7&question_id=0b033ed9-4645-4201-9cc0-f160ca191194&source_detail=9702%2F12+March+2022) |
| **Q34** FRQ | [10.1 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=0b5ead21-a3ad-4a18-9682-8e588f1f22f7&question_id=ac4e2916-08e0-4db1-a1d5-554c8586862f&source_detail=9702%2F12+March+2022) |
| **Q35** FRQ | [10.2 Kirchhoff’s laws](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/kirchhoff-s-laws/) | 1 | 0.20 Easy | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=0b5ead21-a3ad-4a18-9682-8e588f1f22f7&question_id=97e9c3f9-1471-4a38-ad0f-3141ebf62121&source_detail=9702%2F12+March+2022) |
| **Q36** FRQ | [10.2 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=0b5ead21-a3ad-4a18-9682-8e588f1f22f7&question_id=e6945599-6971-4b01-a831-f1ff0f1d3293&source_detail=9702%2F12+March+2022) |
| **Q37** FRQ | [10.3 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=0b5ead21-a3ad-4a18-9682-8e588f1f22f7&question_id=362191b8-be79-4edd-b806-e22bebb0093a&source_detail=9702%2F12+March+2022) |
| **Q38** FRQ | [11.1 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=0b5ead21-a3ad-4a18-9682-8e588f1f22f7&question_id=14555744-8fb4-46de-acfb-271212aed920&source_detail=9702%2F12+March+2022) |
| **Q39** FRQ | [11.1 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=0b5ead21-a3ad-4a18-9682-8e588f1f22f7&question_id=6d3af1ba-a12c-4039-ae54-c062138a0a7a&source_detail=9702%2F12+March+2022) |
| **Q40** FRQ | [11.2 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=0b5ead21-a3ad-4a18-9682-8e588f1f22f7&question_id=4320e230-fe57-4839-b884-f719b3f04883&source_detail=9702%2F12+March+2022) |

## Full questions and mark scheme

This paper is from 2022. Question text, options and the mark scheme are available with Pro access. The metadata above is public so you can still plan revision by topic and difficulty.

[Open this paper](https://www.examsci.com/practice?set_id=0b5ead21-a3ad-4a18-9682-8e588f1f22f7)

## Topics in this paper

- [1.2 SI units](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/si-units/)
- [1.3 Errors and uncertainties](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/errors-and-uncertainties/)
- [1.4 Scalars and vectors](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/scalars-and-vectors/)
- [2.1 Equations of motion](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/equations-of-motion/)
- [3.1 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/)
- [3.2 Non-uniform motion](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/non-uniform-motion/)
- [3.3 Linear momentum and its conservation](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/linear-momentum-and-its-conservation/)
- [5.2 Gravitational potential energy and kinetic energy](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/gravitational-potential-energy-and-kinetic-energy/)
- [4.1 Turning effects of forces](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/turning-effects-of-forces/)
- [4.2 Equilibrium of forces](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/equilibrium-of-forces/)
- [4.3 Density and pressure](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/density-and-pressure/)
- [5.1 Energy conservation](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/energy-conservation/)

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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 0.29 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 0.12, 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 62.5% Easy, 37.5% Medium and 0.0% 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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