# 9702 P1 Energy conservation Topic Questions

> CIE IAL 9702 P1: every Energy conservation topic question from 12 papers (2025–2026), grouped by syllabus point. 25 questions, 25 marks, with direct links…

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CIE IAL · Physics · 9702 P1 · A Level

Every 9702 P1 Energy conservation topic question from the 2025–2027 syllabus, drawn from 12 papers (2025–2026) and grouped by syllabus point. Each row opens a page listing the exact question numbers, marks and a direct link into the paper. These are questions by topic, not full papers, so you can revise one topic at a time.

- 9702 P1
- 7 subtopics
- 25 topic questions
- 12 papers
- 25 tagged marks
- [Back to Energy conservation](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/energy-conservation/)
- [All paper codes](https://www.examsci.com/topics/)

Core finding

**2 recall and apply the principle of conservation of energy is the most frequently assessed subtopic in Energy conservation, with 7 topic questions and 7 marks across 7 papers.** 7 derive … and use it to solve problems follows with 7 topic questions and 7 marks. The topic contains 7 subtopics, 25 topic questions and 25 marks in total. Rows count only the parts tagged to that subtopic, keep the same colour in both charts and repeat paper count, tagged marks and year range in the native table.

## Topic question count and mark distribution

Subtopics are on the vertical axis and sorted from highest to lowest. Only the parts whose knowledge graph matches a subtopic are counted for it, and percentages are each row's share of the tagged total in that chart. A part tagged to several subtopics is counted in each bar, so the bars are not a partition of the topic total.

### Questions by subtopic

question items

- [2 recall and apply the principle of conservation of energy](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/energy-conservation/2-recall-and-apply-the-principle-of-conservation-of-energy/) (7 papers) — 7 · 21.9%
- [7 derive $P = Fv$ and use it to solve problems](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/energy-conservation/7-derive-p-fv-and-use-it-to-solve-problems/) (7 papers) — 7 · 21.9%
- [1 understand the concept of work, and recall and use work done = force × displacement in the direction of the force](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/energy-conservation/1-understand-the-concept-of-work-and-recall-and-use-work-done-force-displacement-in/) (5 papers) — 6 · 18.8%
- [3 recall and understand that the efficiency of a system is the ratio of useful energy output from the system to the total energy input](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/energy-conservation/3-recall-and-understand-that-the-efficiency-of-a-system-is-the-ratio-of-useful-energy/) (5 papers) — 5 · 15.6%
- [6 solve problems using $P = W / t$](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/energy-conservation/6-solve-problems-using-p-w-t/) (3 papers) — 3 · 9.4%
- [4 use the concept of efficiency to solve problems](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/energy-conservation/4-use-the-concept-of-efficiency-to-solve-problems/) (2 papers) — 2 · 6.3%
- [5 define power as work done per unit time](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/energy-conservation/5-define-power-as-work-done-per-unit-time/) (2 papers) — 2 · 6.3%

### Marks by subtopic

marks

- [2 recall and apply the principle of conservation of energy](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/energy-conservation/2-recall-and-apply-the-principle-of-conservation-of-energy/) (7 papers) — 7 · 21.9%
- [7 derive $P = Fv$ and use it to solve problems](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/energy-conservation/7-derive-p-fv-and-use-it-to-solve-problems/) (7 papers) — 7 · 21.9%
- [1 understand the concept of work, and recall and use work done = force × displacement in the direction of the force](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/energy-conservation/1-understand-the-concept-of-work-and-recall-and-use-work-done-force-displacement-in/) (5 papers) — 6 · 18.8%
- [3 recall and understand that the efficiency of a system is the ratio of useful energy output from the system to the total energy input](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/energy-conservation/3-recall-and-understand-that-the-efficiency-of-a-system-is-the-ratio-of-useful-energy/) (5 papers) — 5 · 15.6%
- [6 solve problems using $P = W / t$](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/energy-conservation/6-solve-problems-using-p-w-t/) (3 papers) — 3 · 9.4%
- [4 use the concept of efficiency to solve problems](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/energy-conservation/4-use-the-concept-of-efficiency-to-solve-problems/) (2 papers) — 2 · 6.3%
- [5 define power as work done per unit time](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/energy-conservation/5-define-power-as-work-done-per-unit-time/) (2 papers) — 2 · 6.3%

## Subtopic comparison matrix

Curriculum order is by syllabus number, then alphabetically. Every row links to the matching past-paper question list.

| Subtopic | Topic questions | Papers | Marks | Years | |
| --- | --- | --- | --- | --- | --- |
| **[1 understand the concept of work, and recall and use work done = force × displacement in the direction of the force](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/energy-conservation/1-understand-the-concept-of-work-and-recall-and-use-work-done-force-displacement-in/)** | 6 | 5 | 6 | 2025–2026 | [Open topic questions](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/energy-conservation/1-understand-the-concept-of-work-and-recall-and-use-work-done-force-displacement-in/) |
| **[2 recall and apply the principle of conservation of energy](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/energy-conservation/2-recall-and-apply-the-principle-of-conservation-of-energy/)** | 7 | 7 | 7 | 2025–2026 | [Open topic questions](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/energy-conservation/2-recall-and-apply-the-principle-of-conservation-of-energy/) |
| **[3 recall and understand that the efficiency of a system is the ratio of useful energy output from the system to the total energy input](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/energy-conservation/3-recall-and-understand-that-the-efficiency-of-a-system-is-the-ratio-of-useful-energy/)** | 5 | 5 | 5 | 2025–2026 | [Open topic questions](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/energy-conservation/3-recall-and-understand-that-the-efficiency-of-a-system-is-the-ratio-of-useful-energy/) |
| **[4 use the concept of efficiency to solve problems](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/energy-conservation/4-use-the-concept-of-efficiency-to-solve-problems/)** | 2 | 2 | 2 | 2025–2026 | [Open topic questions](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/energy-conservation/4-use-the-concept-of-efficiency-to-solve-problems/) |
| **[5 define power as work done per unit time](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/energy-conservation/5-define-power-as-work-done-per-unit-time/)** | 2 | 2 | 2 | 2025–2026 | [Open topic questions](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/energy-conservation/5-define-power-as-work-done-per-unit-time/) |
| **[6 solve problems using $P = W / t$](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/energy-conservation/6-solve-problems-using-p-w-t/)** | 3 | 3 | 3 | 2025–2026 | [Open topic questions](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/energy-conservation/6-solve-problems-using-p-w-t/) |
| **[7 derive $P = Fv$ and use it to solve problems](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/energy-conservation/7-derive-p-fv-and-use-it-to-solve-problems/)** | 7 | 7 | 7 | 2025–2026 | [Open topic questions](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/energy-conservation/7-derive-p-fv-and-use-it-to-solve-problems/) |

## Browse every topic question

- [1 understand the concept of work, and recall and use work done = force × displacement in the direction of the force](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/energy-conservation/1-understand-the-concept-of-work-and-recall-and-use-work-done-force-displacement-in/) — 6 question items · 5 papers — 6 marks · 2025–2026
- [2 recall and apply the principle of conservation of energy](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/energy-conservation/2-recall-and-apply-the-principle-of-conservation-of-energy/) — 7 question items · 7 papers — 7 marks · 2025–2026
- [3 recall and understand that the efficiency of a system is the ratio of useful energy output from the system to the total energy input](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/energy-conservation/3-recall-and-understand-that-the-efficiency-of-a-system-is-the-ratio-of-useful-energy/) — 5 question items · 5 papers — 5 marks · 2025–2026
- [4 use the concept of efficiency to solve problems](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/energy-conservation/4-use-the-concept-of-efficiency-to-solve-problems/) — 2 question items · 2 papers — 2 marks · 2025–2026
- [5 define power as work done per unit time](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/energy-conservation/5-define-power-as-work-done-per-unit-time/) — 2 question items · 2 papers — 2 marks · 2025–2026
- [6 solve problems using $P = W / t$](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/energy-conservation/6-solve-problems-using-p-w-t/) — 3 question items · 3 papers — 3 marks · 2025–2026
- [7 derive $P = Fv$ and use it to solve problems](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/energy-conservation/7-derive-p-fv-and-use-it-to-solve-problems/) — 7 question items · 7 papers — 7 marks · 2025–2026

## Other topics in 9702 P1

- [Atoms, nuclei and radiation 27 question items](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/atoms-nuclei-and-radiation/)
- [Density and pressure 26 question items](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/density-and-pressure/)
- [Diffraction 9 question items](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/diffraction/)
- [Doppler effect for sound waves 11 question items](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/doppler-effect-for-sound-waves/)
- [Elastic and plastic behaviour 22 question items](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/elastic-and-plastic-behaviour/)
- [Electric current 13 question items](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/electric-current/)
- [Electromagnetic spectrum 9 question items](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/electromagnetic-spectrum/)
- [Equations of motion 43 question items](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/equations-of-motion/)
- [Equilibrium of forces 17 question items](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/equilibrium-of-forces/)
- [Errors and uncertainties 16 question items](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/errors-and-uncertainties/)

## Topic question rules and edge cases

**How many subtopics does Energy conservation contain?**

This page lists 7 subtopics tagged to the current syllabus. They are ordered by syllabus number, then alphabetically, and each row opens a page of matching past-paper questions.

**How are the subtopic question and mark totals calculated?**

A multiple-choice question contributes one item and its marks to every subtopic it is tagged with. A structured question contributes one item per tagged part, and that part’s marks; untagged parts of the same question are not counted here. A part tagged to several subtopics therefore appears under each of them.

**Why do some subtopics have no numbered prefix?**

Practical-skills statements and some syllabus bullets are unnumbered. Numbered statements come first; unnumbered statements and ties are sorted alphabetically.

**Is the LaTeX rendered without JavaScript?**

Yes. Subtopics that contain formulas are converted to static KaTeX HTML during the build, and the KaTeX stylesheet is served from the same site.

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