# 9709/52 October/November 2019

> 9709/52 October/November 2019: 7 questions, 50 marks. Difficulty 0.43, deviation 0.17, algebraic 0.38, text density 0.54. CIE IAL Mathematics 9709 P5.

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CIE IAL · Mathematics · 2019 October/November

This Mathematics 9709 Paper 5 (Mechanics 2) paper contains 7 questions worth 50 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
- 9709 P5
- 7 questions
- 50 marks
- Free paper
- [Practise this paper](https://www.examsci.com/practice?set_id=ffb0f37e-64a3-43a4-90b8-6b482a748ba6)
- [All 9709 P5 papers](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p5/)

Core finding

**9709/52 October/November 2019 is a past paper for CIE IAL Mathematics 9709 Paper 5 (Mechanics 2), with 7 questions worth 50 marks.** Its mark-weighted Difficulty Measure is 0.43 on a 0.20–0.75 scale, with a Difficulty Deviation of 0.17 and a mark split of 22.0% Easy, 58.0% Medium and 20.0% Hard. Algebraic complexity averages 0.38; text density and modelling average 0.54. All five measures use 14 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 14 parts carrying 50 part marks. Difficulty tags cover 14 parts, algebraic tags 14 and text-density tags 14. Tags are internal metadata, not official exam-board ratings.

- **Difficulty Measure**: 0.43 — 0.20–0.75 · nearer Medium
- **Difficulty Deviation**: 0.17 — 0 = uniform; higher = more mixed
- **Difficulty Ratio**: 22.0 / 58.0 / 20.0 — % Easy / Medium / Hard
- **Algebraic Complexity Measure**: 0.38 — 0.20–0.75 · nearer Medium
- **Text Density and Modelling Measure**: 0.54 — 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** | 0.43 | 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** | 22.0% Easy / 58.0% Medium / 20.0% Hard | marks in band / all tagged marks |
| **Algebraic Complexity Measure** | 0.38 | Σ(c_i × marks_i) / Σmarks_i, with c = 0.20 / 0.45 / 0.75 |
| **Text Density and Modelling Measure** | 0.54 | 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 | [4 Hooke’s law](https://www.examsci.com/topics/cie-ial/mathematics/9709-p5/) | 3 | 0.45 Medium | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=ffb0f37e-64a3-43a4-90b8-6b482a748ba6&question_id=247974e6-cae2-4964-9b48-6fa8406d1f46&source_detail=9709%2F52+October%2FNovember+2019) |
| **Q2** FRQ | [1 Motion of a projectile](https://www.examsci.com/topics/cie-ial/mathematics/9709-p5/) | 5 | 0.20 Easy | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=ffb0f37e-64a3-43a4-90b8-6b482a748ba6&question_id=94c569cd-1726-4e88-88e4-00392ebe19ef&source_detail=9709%2F52+October%2FNovember+2019) |
| **Q3** FRQ | [4 Hooke’s law](https://www.examsci.com/topics/cie-ial/mathematics/9709-p5/) | 6 | 0.45 Medium | 0.45 Medium | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=ffb0f37e-64a3-43a4-90b8-6b482a748ba6&question_id=39d6dd6b-9464-443b-996e-7de96ca4f3ee&source_detail=9709%2F52+October%2FNovember+2019) |
| **Q4** FRQ | [1 Motion of a projectile](https://www.examsci.com/topics/cie-ial/mathematics/9709-p5/) | 6 | 0.45 Medium | 0.45 Medium | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=ffb0f37e-64a3-43a4-90b8-6b482a748ba6&question_id=e3d2b282-f4a9-4604-93d5-adf7a6268a01&source_detail=9709%2F52+October%2FNovember+2019) |
| **Q5** FRQ | [3 Uniform motion in a circle](https://www.examsci.com/topics/cie-ial/mathematics/9709-p5/) | 10 | 0.45 Medium | 0.45 Medium | 0.75 High | [Go to Practice Hub](https://www.examsci.com/practice?set_id=ffb0f37e-64a3-43a4-90b8-6b482a748ba6&question_id=6fffdaac-cf6b-4fad-9199-13ffdaafe83d&source_detail=9709%2F52+October%2FNovember+2019) |
| **Q6** FRQ | [5 Linear motion under a variable force](https://www.examsci.com/topics/cie-ial/mathematics/9709-p5/) | 9 | 0.45 Medium | 0.34 Medium | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=ffb0f37e-64a3-43a4-90b8-6b482a748ba6&question_id=734ffe8d-ef5c-4c29-8214-26dae9dc4091&source_detail=9709%2F52+October%2FNovember+2019) |
| **Q7** FRQ | [2 Equilibrium of a rigid body](https://www.examsci.com/topics/cie-ial/mathematics/9709-p5/) | 11 | 0.50 Medium | 0.40 Medium | 0.59 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=ffb0f37e-64a3-43a4-90b8-6b482a748ba6&question_id=d3114c32-0b6d-47da-9bf3-4d9c44694323&source_detail=9709%2F52+October%2FNovember+2019) |

## Topics in this paper

- [4 Hooke’s law](https://www.examsci.com/topics/cie-ial/mathematics/9709-p5/)
- [1 Motion of a projectile](https://www.examsci.com/topics/cie-ial/mathematics/9709-p5/)
- [3 Uniform motion in a circle](https://www.examsci.com/topics/cie-ial/mathematics/9709-p5/)
- [5 Linear motion under a variable force](https://www.examsci.com/topics/cie-ial/mathematics/9709-p5/)
- [2 Equilibrium of a rigid body](https://www.examsci.com/topics/cie-ial/mathematics/9709-p5/)

## Related papers

- [9709/51](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p5/2019-october-november-9709-51/) — October/November 2019 — 7 questions · 50 marks — Free
- [9709/53](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p5/2019-october-november-9709-53/) — October/November 2019 — 7 questions · 50 marks — Free
- [9709/51](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p5/2019-may-june-9709-51/) — May/June 2019 — 7 questions · 50 marks — Free
- [9709/52](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p5/2019-may-june-9709-52/) — May/June 2019 — 7 questions · 50 marks — Free
- [9709/53](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p5/2019-may-june-9709-53/) — May/June 2019 — 7 questions · 50 marks — Free
- [9709/52](https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p5/2019-march-9709-52/) — March 2019 — 7 questions · 50 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 0.43 from 14 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 22.0% Easy, 58.0% Medium and 20.0% 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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Full page with native tables, bar charts and Practice Hub links: https://www.examsci.com/past-papers/cie-ial/mathematics/9709-p5/2019-october-november-9709-52/