
Did you solve it? Isaac Newton’s tower drop puzzle
Photograph: Tom Jenkins/The GuardianView image in fullscreen Photograph: Tom Jenkins/The GuardianAlex Bellos's Monday puzzleMathematicsDid you solve it? Isaac Newton’s tower drop puzzleThe solution to the seventeenth century stumperAlex BellosMon 28 Sep 2026 11.48 EDTLast modified on Mon 28 Sep 2026 11.56 EDTSharePrefer the Guardian on GoogleEarlier today I set you a puzzle that Isaac Newton posed in 1679 in a latter to Robert Hooke. I mentioned that the answer is counter-intuitive, and also gave you the hint that it might have something to do with figure skating.
- ▪Photograph: Tom Jenkins/The GuardianView image in fullscreen Photograph: Tom Jenkins/The GuardianAlex Bellos's Monday puzzleMathematicsDid you solve it?
- ▪Isaac Newton’s tower drop puzzleThe solution to the seventeenth century stumperAlex BellosMon 28 Sep 2026 11.48 EDTLast modified on Mon 28 Sep 2026 11.56 EDTSharePrefer the Guardian on GoogleEarlier today I set you a puzzle that Isaac Newto
- ▪I mentioned that the answer is counter-intuitive, and also gave you the hint that it might have something to do with figure skating.
The Guardian — Science publishes from United Kingdom and files mainly under science. We currently carry 113 of its stories.
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| Original publisher | The Guardian — Science |
| Canonical URL | https://www.theguardian.com/science/2026/sep/28/did-you-solve-it-isaac-newtons-tower-drop-puzzle |
| Publication time | Mon, 28 Sep 2026 15:48:00 GMT |
| Retrieval time | 2026-09-28T18:25:14.477Z |
| Last seen | 2026-09-28T18:25:14.477Z |
| Headline source | Publisher (no WeSearch rewrite) |
| Excerpt source | publisher body |
| Excerpt method | First ~120 words (~800 chars) of extracted publisher body, fair-use limited. |
| Summary | WeSearch · cerebras-chat (WeSearch summarizer) |
| Summary source text | contentText |
| Citation coverage | Summary is a WeSearch-generated derivative; primary citation is the original publisher URL. |
| Cluster | slVq5aK3lwaI · 2 stories |
| Cluster logic | Grouped by semantic title/content similarity across sources within a rolling window. Same-publisher template collisions are excluded from coverage comparison. |
| Ranking reason | Story pages are not engagement-ranked. Hub feeds use recency, with optional source-diversified chronological ordering (cap consecutive stories per source). No personalized ranking. |
| Publisher visit | Yes — open original |
| Substitutes article? | No — link-out required for full text |
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| Indexing | May the item be indexed (stored, ranked, made findable)? | Allowed |
| Snippet | May a short excerpt of the publisher's text be shown? | Allowed |
| AI summary | May WeSearch generate its own short summary of the article? | Limited |
| Retrieval / RAG | May the content be exposed for third-party retrieval-augmented generation? | Not asserted |
| Model training | May the content be used to train AI models? | Not asserted |
| Commercial reuse | May the content be reused commercially? | Not permitted |
Basis: Derived from the published RSS/Atom feed. Contact: [email protected]. Reviewed: 2026-07-24.
Opening excerpt (first ~120 words) tap to expand
Photograph: Tom Jenkins/The GuardianView image in fullscreen Photograph: Tom Jenkins/The GuardianAlex Bellos's Monday puzzleMathematicsDid you solve it? Isaac Newton’s tower drop puzzleThe solution to the seventeenth century stumperAlex BellosMon 28 Sep 2026 11.48 EDTLast modified on Mon 28 Sep 2026 11.56 EDTSharePrefer the Guardian on GoogleEarlier today I set you a puzzle that Isaac Newton posed in 1679 in a latter to Robert Hooke. I mentioned that the answer is counter-intuitive, and also gave you the hint that it might have something to do with figure skating. Here’s the problem again, with its solution.The tower dropThe first known diagram of the puzzle, from Claude Dechales Cursus seu Mundus Mathematicus (1674).An object is dropped from a high tower.
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Excerpt limited to ~120 words for fair-use compliance. The full article is at The Guardian — Science.