# 9702/12 May/June 2019

> 9702/12 May/June 2019: 40 questions, 40 marks. Difficulty 0.32, deviation 0.12, algebraic 0.27, text density 0.38. CIE IAL Physics 9702 P1.

- Canonical HTML: https://www.examsci.com/past-papers/cie-ial/physics/9702-paper-1/2019-may-june-9702-12/
- Markdown mirror: https://www.examsci.com/past-papers/cie-ial/physics/9702-paper-1/2019-may-june-9702-12/index.md

---

CIE IAL · Physics · 2019 May/June

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=5e4d0ba5-05e1-4782-9e1a-1dae8787a340)
- [All 9702 P1 papers](https://www.examsci.com/past-papers/cie-ial/physics/9702-paper-1/)

Core finding

**9702/12 May/June 2019 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 0.12 and a mark split of 52.5% Easy, 47.5% Medium and 0.0% Hard. Algebraic complexity averages 0.27; text density and modelling average 0.38. 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**: 0.12 — 0 = uniform; higher = more mixed
- **Difficulty Ratio**: 52.5 / 47.5 / 0.0 — % Easy / Medium / Hard
- **Algebraic Complexity Measure**: 0.27 — 0.20–0.75 · nearer Low
- **Text Density and Modelling Measure**: 0.38 — 0.20–0.75 · nearer Medium

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** | 0.12 | √(Σw_i(d_i − μ)^2 / Σw_i) |
| **Difficulty Ratio** | 52.5% Easy / 47.5% Medium / 0.0% Hard | marks in band / all tagged marks |
| **Algebraic Complexity Measure** | 0.27 | Σ(c_i × marks_i) / Σmarks_i, with c = 0.20 / 0.45 / 0.75 |
| **Text Density and Modelling Measure** | 0.38 | 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=5e4d0ba5-05e1-4782-9e1a-1dae8787a340&question_id=edd612d5-92e3-4fdd-b844-232d8acc1961&source_detail=9702%2F12+May%2FJune+2019) |
| **Q2** FRQ | [1.2 SI units](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/si-units/) | 1 | 0.45 Medium | 0.45 Medium | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=5e4d0ba5-05e1-4782-9e1a-1dae8787a340&question_id=0e14e887-c511-40a2-8574-3f278ee8d949&source_detail=9702%2F12+May%2FJune+2019) |
| **Q3** FRQ | [1.2 SI units](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/si-units/) | 1 | 0.45 Medium | 0.45 Medium | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=5e4d0ba5-05e1-4782-9e1a-1dae8787a340&question_id=e14f41b0-d333-43d2-b103-e96bc9bd092b&source_detail=9702%2F12+May%2FJune+2019) |
| **Q4** FRQ | [1.4 Scalars and vectors](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/scalars-and-vectors/) | 1 | 0.45 Medium | 0.45 Medium | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=5e4d0ba5-05e1-4782-9e1a-1dae8787a340&question_id=17735de1-17d6-4f9c-945c-78e63a1208aa&source_detail=9702%2F12+May%2FJune+2019) |
| **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 | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=5e4d0ba5-05e1-4782-9e1a-1dae8787a340&question_id=1b6c7aad-bd79-47f5-bf3c-d5eb42d3097b&source_detail=9702%2F12+May%2FJune+2019) |
| **Q6** FRQ | [2.2 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=5e4d0ba5-05e1-4782-9e1a-1dae8787a340&question_id=68fd8147-9f2c-49d2-9b59-3f307b077321&source_detail=9702%2F12+May%2FJune+2019) |
| **Q7** FRQ | [2.2 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=5e4d0ba5-05e1-4782-9e1a-1dae8787a340&question_id=4f95df5d-27c8-40dd-87a6-d0722a3c6ad0&source_detail=9702%2F12+May%2FJune+2019) |
| **Q8** FRQ | [3.1 Equations of motion](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/equations-of-motion/) | 1 | 0.45 Medium | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=5e4d0ba5-05e1-4782-9e1a-1dae8787a340&question_id=2534bdc0-6b13-415b-ba95-543078a32b3d&source_detail=9702%2F12+May%2FJune+2019) |
| **Q9** 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=5e4d0ba5-05e1-4782-9e1a-1dae8787a340&question_id=e6d50bd3-746d-41a3-a02d-d9d95a2c9f68&source_detail=9702%2F12+May%2FJune+2019) |
| **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 | 0.45 Medium | 0.45 Medium | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=5e4d0ba5-05e1-4782-9e1a-1dae8787a340&question_id=63808167-fa23-4cb3-b839-cc8b19996934&source_detail=9702%2F12+May%2FJune+2019) |
| **Q11** FRQ | [4.3 Linear momentum and its conservation](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/linear-momentum-and-its-conservation/) | 1 | 0.20 Easy | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=5e4d0ba5-05e1-4782-9e1a-1dae8787a340&question_id=b41a6c0f-a533-4b82-8206-3d949500275f&source_detail=9702%2F12+May%2FJune+2019) |
| **Q12** 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=5e4d0ba5-05e1-4782-9e1a-1dae8787a340&question_id=9b8892b6-05a1-4ae9-991b-956056f4df3d&source_detail=9702%2F12+May%2FJune+2019) |
| **Q13** FRQ | [6.2 Work and efficiency](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=5e4d0ba5-05e1-4782-9e1a-1dae8787a340&question_id=ba8a1b8c-0cce-49ec-a04d-4e626d079d7f&source_detail=9702%2F12+May%2FJune+2019) |
| **Q14** 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 | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=5e4d0ba5-05e1-4782-9e1a-1dae8787a340&question_id=11ce9016-1053-4951-a08e-8005e0e0ec36&source_detail=9702%2F12+May%2FJune+2019) |
| **Q15** 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 | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=5e4d0ba5-05e1-4782-9e1a-1dae8787a340&question_id=3e1320b8-c3a2-4820-bc02-87778af65c2d&source_detail=9702%2F12+May%2FJune+2019) |
| **Q16** 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 | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=5e4d0ba5-05e1-4782-9e1a-1dae8787a340&question_id=78392093-f5e1-4897-babe-ac6e9de1a157&source_detail=9702%2F12+May%2FJune+2019) |
| **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 | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=5e4d0ba5-05e1-4782-9e1a-1dae8787a340&question_id=f40531f4-bd9a-4594-9bca-6b43f6095b12&source_detail=9702%2F12+May%2FJune+2019) |
| **Q18** FRQ | [6.3 Potential energy and kinetic energy](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=5e4d0ba5-05e1-4782-9e1a-1dae8787a340&question_id=cf31f39a-5109-4782-a66a-5e41df4f939d&source_detail=9702%2F12+May%2FJune+2019) |
| **Q19** FRQ | [6.2 Work and efficiency](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/) | 1 | 0.45 Medium | 0.45 Medium | 0.75 High | [Go to Practice Hub](https://www.examsci.com/practice?set_id=5e4d0ba5-05e1-4782-9e1a-1dae8787a340&question_id=98b5addc-dea3-48fe-943a-c6568b0aa8b1&source_detail=9702%2F12+May%2FJune+2019) |
| **Q20** FRQ | [9.1 Stress and strain](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/stress-and-strain/) | 1 | 0.45 Medium | 0.45 Medium | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=5e4d0ba5-05e1-4782-9e1a-1dae8787a340&question_id=b45dd838-e472-4af7-a843-b77b6410426d&source_detail=9702%2F12+May%2FJune+2019) |
| **Q21** FRQ | [5.4 Density and pressure](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/density-and-pressure/) | 1 | 0.45 Medium | 0.45 Medium | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=5e4d0ba5-05e1-4782-9e1a-1dae8787a340&question_id=6bc07311-b3ce-4ec5-86d3-4b03ee58283c&source_detail=9702%2F12+May%2FJune+2019) |
| **Q22** 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=5e4d0ba5-05e1-4782-9e1a-1dae8787a340&question_id=985044b5-9f39-4710-884e-ac31a3e642b3&source_detail=9702%2F12+May%2FJune+2019) |
| **Q23** FRQ | [14.1 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=5e4d0ba5-05e1-4782-9e1a-1dae8787a340&question_id=df0be529-5df2-4b45-9c48-228d87214631&source_detail=9702%2F12+May%2FJune+2019) |
| **Q24** 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=5e4d0ba5-05e1-4782-9e1a-1dae8787a340&question_id=e26939cc-944c-44d2-a4b4-20ec4106daab&source_detail=9702%2F12+May%2FJune+2019) |
| **Q25** FRQ | [14.3 Determination of frequency and wavelength of sound waves](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=5e4d0ba5-05e1-4782-9e1a-1dae8787a340&question_id=f12adae0-a1e3-417c-bacd-9627bcf8c19d&source_detail=9702%2F12+May%2FJune+2019) |
| **Q26** FRQ | [14.4 Doppler effect](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/) | 1 | 0.45 Medium | 0.45 Medium | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=5e4d0ba5-05e1-4782-9e1a-1dae8787a340&question_id=bffa5909-6df4-493f-8a15-ec8ab51e18c7&source_detail=9702%2F12+May%2FJune+2019) |
| **Q27** 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=5e4d0ba5-05e1-4782-9e1a-1dae8787a340&question_id=323647f6-ffd4-4a3d-b6d1-ed8dbc536ae4&source_detail=9702%2F12+May%2FJune+2019) |
| **Q28** 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 | 0.45 Medium | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=5e4d0ba5-05e1-4782-9e1a-1dae8787a340&question_id=4096e8c7-6ae6-4cd0-b5fa-4e9579477bf1&source_detail=9702%2F12+May%2FJune+2019) |
| **Q29** FRQ | [15.4 Diffraction gratings](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=5e4d0ba5-05e1-4782-9e1a-1dae8787a340&question_id=597d7ad0-717b-4f5c-b017-038c15fb813e&source_detail=9702%2F12+May%2FJune+2019) |
| **Q30** 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 | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=5e4d0ba5-05e1-4782-9e1a-1dae8787a340&question_id=d0f4b831-555e-429d-9048-c1984bf11cc8&source_detail=9702%2F12+May%2FJune+2019) |
| **Q31** 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 | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=5e4d0ba5-05e1-4782-9e1a-1dae8787a340&question_id=6f3d438b-b5a7-406e-993b-a38fbd0f49f9&source_detail=9702%2F12+May%2FJune+2019) |
| **Q32** FRQ | [17.2 Uniform electric fields](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/) | 1 | 0.20 Easy | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=5e4d0ba5-05e1-4782-9e1a-1dae8787a340&question_id=f9702984-6057-45e4-9247-e4a7579eea0b&source_detail=9702%2F12+May%2FJune+2019) |
| **Q33** 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 | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=5e4d0ba5-05e1-4782-9e1a-1dae8787a340&question_id=7a77d71b-aea9-40bd-b6ac-42db4ace4ab6&source_detail=9702%2F12+May%2FJune+2019) |
| **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=5e4d0ba5-05e1-4782-9e1a-1dae8787a340&question_id=a74b2866-6620-425a-a18b-f2cff4046bee&source_detail=9702%2F12+May%2FJune+2019) |
| **Q35** FRQ | [20.1 Practical circuits](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/practical-circuits/) | 1 | 0.45 Medium | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=5e4d0ba5-05e1-4782-9e1a-1dae8787a340&question_id=3961b2e8-5637-4abf-826d-7077035cc6c8&source_detail=9702%2F12+May%2FJune+2019) |
| **Q36** FRQ | [20.2 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=5e4d0ba5-05e1-4782-9e1a-1dae8787a340&question_id=4c8d00db-ef17-4b0f-8976-44c62899ca34&source_detail=9702%2F12+May%2FJune+2019) |
| **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=5e4d0ba5-05e1-4782-9e1a-1dae8787a340&question_id=67fd7bcb-b35c-4231-8453-2c8db8aadb21&source_detail=9702%2F12+May%2FJune+2019) |
| **Q38** FRQ | [26.1 Atoms, nuclei and radiation](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/atoms-nuclei-and-radiation/) | 1 | 0.45 Medium | 0.45 Medium | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=5e4d0ba5-05e1-4782-9e1a-1dae8787a340&question_id=724ebcbe-c7f5-452e-a30b-932daca016b4&source_detail=9702%2F12+May%2FJune+2019) |
| **Q39** 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=5e4d0ba5-05e1-4782-9e1a-1dae8787a340&question_id=8a8085e6-5ce1-406f-9659-7a3023e056c3&source_detail=9702%2F12+May%2FJune+2019) |
| **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=5e4d0ba5-05e1-4782-9e1a-1dae8787a340&question_id=fae2178d-8225-4c59-a94b-0ab6608a9641&source_detail=9702%2F12+May%2FJune+2019) |

## Topics in this paper

- [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/)
- [2.2 Errors and uncertainties](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/errors-and-uncertainties/)
- [5.4 Density and pressure](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/density-and-pressure/)
- [3.1 Equations of motion](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/equations-of-motion/)
- [4.2 Non-uniform motion](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/non-uniform-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/)
- [4.3 Linear momentum and its conservation](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/linear-momentum-and-its-conservation/)
- [5.1 Types of force](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/)
- [5.3 Equilibrium of forces](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/equilibrium-of-forces/)
- [6.2 Work and efficiency](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/)
- [17.2 Uniform electric fields](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/)

## Related papers

- [9702/11](https://www.examsci.com/past-papers/cie-ial/physics/9702-paper-1/2019-october-november-9702-11/) — October/November 2019 — 40 questions · 40 marks — Free
- [9702/12](https://www.examsci.com/past-papers/cie-ial/physics/9702-paper-1/2019-october-november-9702-12/) — October/November 2019 — 40 questions · 40 marks — Free
- [9702/13](https://www.examsci.com/past-papers/cie-ial/physics/9702-paper-1/2019-october-november-9702-13/) — October/November 2019 — 40 questions · 40 marks — Free
- [9702/11](https://www.examsci.com/past-papers/cie-ial/physics/9702-paper-1/2019-may-june-9702-11/) — May/June 2019 — 40 questions · 40 marks — Free
- [9702/13](https://www.examsci.com/past-papers/cie-ial/physics/9702-paper-1/2019-may-june-9702-13/) — May/June 2019 — 40 questions · 40 marks — Free
- [9702/12](https://www.examsci.com/past-papers/cie-ial/physics/9702-paper-1/2019-march-9702-12/) — March 2019 — 40 questions · 40 marks — Free

## 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 0.12, 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 52.5% Easy, 47.5% 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.

---

Full page with native tables, bar charts and Practice Hub links: https://www.examsci.com/past-papers/cie-ial/physics/9702-paper-1/2019-may-june-9702-12/