# Topic Questions: 22 be able to use the equations $efficiency=\frac{useful~energy~output}{total~energy~input}$ and $efficiency=\frac{useful~power~output}{total~power~input}$ — WPH11 Mechanics

> 22 WPH11 Mechanics topic questions (52 marks) on 22 be able to use the equations … and … — 19 papers, 2019–2026. Open the exact question in the original…

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Edexcel IAL · Physics · WPH11 · Mechanics

22 WPH11 Mechanics topic questions are tagged to this syllabus point across 19 papers (2019–2026). Only the parts whose knowledge graph matches this syllabus statement are counted, and the table shows which parts of each question are involved.

- 22 topic questions
- 19 papers
- 52 tagged marks
- 4.0% of topic questions
- 3.9% of topic marks
- 2019–2026
- Syllabus 2018–current
- [All WPH11 Mechanics topic questions](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-1-wph11/mechanics/)
- [All paper codes](https://www.examsci.com/topics/)

Core finding

**This Mechanics syllabus point appears in 19 WPH11 papers across 2019–2026, contributing 22 topic questions and 52 marks.** The most recent appearance is WPH11/01 January 2026. That equals 4.0% of the 548 topic questions and 3.9% of the 1,340 marks tagged to Mechanics. Only parts tagged to this subtopic are counted, so a four-part question can contribute one item and one part's marks. The table lists every matching question, its tagged parts and marks, with a link back to the paper page. Sessions are newest first, so the statement can be traced back through the full paper history.

## Topic questions by session

Newest sessions first. Parts and marks count only the parts tagged to this subtopic; “x of y parts” shows how much of the question is tagged elsewhere. Select the paper cell to open the matching question on the paper page, or use **Go to Practice Hub** to answer that exact question in the Interactive Practice Hub.

| Paper | Question | Type | Parts | Marks | Difficulty | Practice |
| --- | --- | --- | --- | --- | --- | --- |
| [**WPH11/01** January 2026 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-1-wph11/2026-january-wph11-01/#q-12) | **Q12** Power and Efficiency - Edexcel IAL Physics Unit 1 Jan 2026 Q12 | FRQ | 1 part | 4 | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=f7bbb48f-3899-4c6f-b09f-fa826d328a68&question_id=7ac07c0c-9332-4a1c-9709-2670ebc3a5ff&source_detail=WPH11%2F01+January+2026) |
| [**WPH11/02** October 2025 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-1-wph11/2025-october-wph11-02/#q-12) | **Q12** Power and Efficiency of Airport Walkway - Edexcel IAL Physics Oct 2025 Q12 | FRQ | 1 of 2 parts ((b)) | 3 of 6 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=206d9659-8eb1-4877-a884-b687de9cdf96&question_id=46d92f9f-787c-43ff-9452-122781915806&source_detail=WPH11%2F02+October+2025) |
| [**WPH11/01** June 2025 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-1-wph11/2025-june-wph11-01/#q-14) | **Q14** Electric Car Braking Efficiency - Edexcel IAL Physics Jun 2025 Q14 | FRQ | 1 part | 4 | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=2a1cdf33-a9db-4ce2-b66a-788f175d980c&question_id=c71fa241-2a31-443a-a401-f31e2fbda642&source_detail=WPH11%2F01+June+2025) |
| [**WPH11/01** January 2025 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-1-wph11/2025-january-wph11-01/#q-15) | **Q15** Cruachan Hydroelectric Power Calculations - Edexcel IAL Physics Jan 2025 Q15 | FRQ | 1 of 2 parts ((b)) | 2 of 7 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=ec128daf-6502-434e-a88b-2c3dad32a1bd&question_id=721f45ab-fbf9-42a3-9d57-fef21b9b42dc&source_detail=WPH11%2F01+January+2025) |
| [**WPH11/01** October 2024 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-1-wph11/2024-october-wph11-01/#q-6) | **Q6** Power Input of moving staircase - Edexcel IAL Physics Oct 2024 Q6 | MCQ | MCQ · 1 part | 1 | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=abf33b21-e4d9-4ff8-ad87-235e71deb7e0&question_id=20d011f2-c3fb-4f7e-8f17-6f0a6179ddba&source_detail=WPH11%2F01+October+2024) |
| [**WPH11/01** June 2024 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-1-wph11/2024-june-wph11-01/#q-1) | **Q1** Efficiency of a Mine Water Removal Engine - Edexcel IAL Physics Jun 2024 Q1 | MCQ | MCQ · 1 part | 1 | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=60c883e1-3934-457c-b1ff-60cf87441771&question_id=790a57f0-99d0-496a-8f29-9473c9fb5b1b&source_detail=WPH11%2F01+June+2024) |
| [**WPH11/01** October 2023 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-1-wph11/2023-october-wph11-01/#q-7) | **Q7** Power Station Efficiency - Edexcel IAL Physics Oct 2023 Q7 | MCQ | MCQ · 1 part | 1 | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=15e3f88f-24f6-422e-8f4a-6de82da3ed98&question_id=e1748a5e-9345-4989-bb53-5b6dfd8d3da9&source_detail=WPH11%2F01+October+2023) |
| [**WPH11/01** June 2023 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-1-wph11/2023-june-wph11-01/#q-19) | **Q19** Crane Power and Principle of Moments - Edexcel IAL Physics Unit 1 Summer 2023 Q19 | FRQ | 1 of 3 parts ((a)) | 4 of 13 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=dc6d3961-d2d0-430e-815a-816bfd3cb268&question_id=8d2c569d-5cff-42c7-9be4-8e8fed8a73be&source_detail=WPH11%2F01+June+2023) |
| [**WPH11/01** January 2023 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-1-wph11/2023-january-wph11-01/#q-17) | **Q17** High Striker Game Analysis - Edexcel IAL Physics Jan 2023 Q17 | FRQ | 1 of 3 parts ((b)) | 5 of 10 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=9b8108c7-40af-4a33-b373-0ba0dae27340&question_id=ac84e416-6c9b-44dd-b378-3ccbe66aa995&source_detail=WPH11%2F01+January+2023) |
| [**WPH11/01** October 2022 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-1-wph11/2022-october-wph11-01/#q-10) | **Q10** Pump Efficiency Calculation - Edexcel IAL Physics Oct 2022 Q10 | MCQ | MCQ · 1 part | 1 | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e613f67e-77fc-4141-8190-504991cfb0ac&question_id=6c18740a-4912-4cd3-a205-bb8b4923c7d8&source_detail=WPH11%2F01+October+2022) |
| [**WPH11/01** June 2022 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-1-wph11/2022-june-wph11-01/#q-14) | **Q14** Regenerative Braking and Efficiency - Edexcel IAL Physics Jun 2022 Q14 | FRQ | 2 of 3 parts ((a), (b)(ii)) | 7 of 8 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=a4a954db-f07e-437a-8405-65316f754d19&question_id=bb903a7a-2793-42f5-907a-3d2c25dc5fc1&source_detail=WPH11%2F01+June+2022) |
| [**WPH11/01** January 2022 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-1-wph11/2022-january-wph11-01/#q-12) | **Q12** Lift and Counterweight System - Edexcel IAL Physics Jan 2022 Q12 | FRQ | 1 of 3 parts ((c)) | 2 of 8 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=1b234f87-a29d-4049-b582-537e5e9160a9&question_id=32fbe25e-92fb-4751-b1e3-39b219504dcc&source_detail=WPH11%2F01+January+2022) |
| [**WPH11/01** October 2021 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-1-wph11/2021-october-wph11-01/#q-18) | **Q18** Moving Stone Block - Edexcel IAL Physics Oct 2021 Q18 | FRQ | 1 of 4 parts ((d)) | 2 of 9 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=c6a436cd-ce2e-4b48-9819-5ec3a7ae39c6&question_id=2bea83b8-b826-45b4-a319-fb55e7e7ba1b&source_detail=WPH11%2F01+October+2021) |
| [**WPH11/01** June 2021 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-1-wph11/2021-june-wph11-01/#q-4) | **Q4** Hydroelectric Power Station Calculations - Edexcel IAL Physics Jun 2021 Q4 | MCQ | MCQ · 1 part | 1 | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=5059932b-1c99-4e4c-90f2-0dc7111b867a&question_id=bdd95def-0e92-4dcb-9a7c-12b6f8c74bd5&source_detail=WPH11%2F01+June+2021) |
| [**WPH11/01** June 2021 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-1-wph11/2021-june-wph11-01/#q-17) | **Q17** Nylon Rope Pulley System - Edexcel IAL Physics Jun 2021 Q17 | FRQ | 1 of 5 parts ((c)) | 2 of 12 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=5059932b-1c99-4e4c-90f2-0dc7111b867a&question_id=b8bff66b-4f35-4bbb-8c9d-3588e2a9ce2d&source_detail=WPH11%2F01+June+2021) |
| [**WPH11/01** January 2021 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-1-wph11/2021-january-wph11-01/#q-12) | **Q12** Moving Walkway Power Analysis - Edexcel IAL Physics Jan 2021 Q12 | FRQ | 1 of 2 parts ((b)) | 3 of 6 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=731e4d52-84b1-40ad-99c4-b89586f8f9db&question_id=a5129b56-f120-4b5b-b1ce-0f68b38042d3&source_detail=WPH11%2F01+January+2021) |
| [**WPH11/01** October 2020 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-1-wph11/2020-october-wph11-01/#q-6) | **Q6** Efficiency and Supplied Energy - Edexcel IAL Physics Oct 2020 Q6 | MCQ | MCQ · 1 part | 1 | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=de7f3e55-de2d-40f1-9868-c21f740ee82c&question_id=0373d5b5-15f0-4165-af6d-dc4aece01bbb&source_detail=WPH11%2F01+October+2020) |
| [**WPH11/01** October 2020 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-1-wph11/2020-october-wph11-01/#q-11) | **Q11** Fuel Energy and Power - Edexcel IAL Physics Oct 2020 Q11 | FRQ | 1 of 3 parts ((c)) | 2 of 7 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=de7f3e55-de2d-40f1-9868-c21f740ee82c&question_id=ba9e6cb9-f349-4f4e-8a75-d3678aea77ec&source_detail=WPH11%2F01+October+2020) |
| [**WPH11/01** January 2020 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-1-wph11/2020-january-wph11-01/#q-8) | **Q8** Motor Efficiency and Energy Calculation - Edexcel IAL Physics Jan 2020 Q8 | MCQ | MCQ · 1 part | 1 | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=1a116037-6139-44bc-8f9d-116738b54706&question_id=f08c49f8-3fae-4e8b-843a-a0d06bc2a9e5&source_detail=WPH11%2F01+January+2020) |
| [**WPH11/01** June 2019 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-1-wph11/2019-june-wph11-01/#q-12) | **Q12** Efficiency of Simple Machine on Slope - Edexcel IAL Physics Jun 2019 Q12 | FRQ | 1 part | 4 | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=9c0ae983-58e3-4d98-b727-ddb00ea25c86&question_id=91b620c4-a8e8-479c-a8f6-5897dc835a0e&source_detail=WPH11%2F01+June+2019) |
| [**WPH11/01** January 2019 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-1-wph11/2019-january-wph11-01/#q-4) | **Q4** Ramp Efficiency - Edexcel IAL Physics Jan 2019 Q4 | MCQ | MCQ · 1 part | 1 | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=34ce4699-61aa-4a3f-abf1-62330761fb43&question_id=46cd600b-d70b-4d1b-845c-255d0f3ba0cb&source_detail=WPH11%2F01+January+2019) |

## Related topic questions in Mechanics

- [1 be able to use the equations for uniformly accelerated motion in one dimension: $s=\frac{(u+v)t}{2}$ $v=u+at$ $s=ut+\frac{1}{2}at^{2}$ $v^{2}=u^{2}+2as$](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-1-wph11/mechanics/1-be-able-to-use-the-equations-for-uniformly-accelerated-motion-in-one-dimension-s/) — 73 question items · 23 papers — 207 marks · 2019–2026
- [2 be able to draw and interpret displacement-time, velocity-time and acceleration-time graphs](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-1-wph11/mechanics/2-be-able-to-draw-and-interpret-displacement-time-velocity-time-and-acceleration-time/) — 39 question items · 20 papers — 82 marks · 2019–2026
- [3 know the physical quantities derived from the slopes and areas of displacement-time, velocity-time and acceleration-time graphs, including cases of non-uniform acceleration and understand how to use the quantities](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-1-wph11/mechanics/3-know-the-physical-quantities-derived-from-the-slopes-and-areas-of-displacement-time/) — 33 question items · 20 papers — 67 marks · 2019–2026
- [4 understand scalar and vector quantities and know examples of each type of quantity and recognise vector notation](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-1-wph11/mechanics/4-understand-scalar-and-vector-quantities-and-know-examples-of-each-type-of-quantity/) — 29 question items · 22 papers — 30 marks · 2019–2026
- [5 be able to resolve a vector into two components at right angles to each other by drawing and by calculation](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-1-wph11/mechanics/5-be-able-to-resolve-a-vector-into-two-components-at-right-angles-to-each-other-by/) — 59 question items · 23 papers — 175 marks · 2019–2026
- [6 be able to find the resultant of two coplanar vectors at any angle to each other by drawing, and at right angles to each other by calculation](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-1-wph11/mechanics/6-be-able-to-find-the-resultant-of-two-coplanar-vectors-at-any-angle-to-each-other-by/) — 29 question items · 22 papers — 64 marks · 2019–2026

## Topic question rules and edge cases

**How many topic questions cover this syllabus point?**

21 question stems cover this subtopic across 19 papers, but only 22 tagged parts and 52 marks belong to it. Other parts of the same questions are assessed under different statements and are excluded from this page.

**Which papers include this subtopic?**

The table lists every matching session from 2019–2026. Each row links to the question anchor on the paper page, where the full paper context and practice entry point are available.

**Why can one question appear under several subtopics?**

The parts of one question can assess different syllabus statements. Each part is counted under its own subtopics, so the same question stem can appear on several subtopic pages while each page lists only the parts and marks tagged to that statement.

**Can I practise these questions with AI marking?**

Yes. Open a paper from the table and use the Interactive Practice Hub entry point. The page itself is static HTML so search engines and retrieval agents can read the full question list without executing JavaScript.

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Full page with native tables, bar charts and Practice Hub links: https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-1-wph11/mechanics/22-be-able-to-use-the-equations-efficiency-frac-useful-energy-output-total-energy/