Brachistochrone
Total watch time
19m 59s
at 1× speed · exactly 19 minutes, 59 seconds at 1×
| 1× | 19m 59s |
|---|---|
| 1.25× | 15m 59s |
| 1.5× | 13m 19s |
| 1.75× | 11m 25s |
| 2× | 10m |
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Videos (2)
19m 59s in total · tick what you've watched
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| Watched | ||||
|---|---|---|---|---|
| 1 |
 The Brachistochrone, with Steven Strogatz
|
16:02 | 2016-04-01 | |
| 2 |
 Snell's law proof using springs
|
3:57 | 2016-04-01 |
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[](https://playlistduration.com/playlist/PLZHQObOWTQDM7GZNAL2pvtP5rZVCeHGgz)<a href="https://playlistduration.com/playlist/PLZHQObOWTQDM7GZNAL2pvtP5rZVCeHGgz"><img src="https://playlistduration.com/badge/playlist/PLZHQObOWTQDM7GZNAL2pvtP5rZVCeHGgz.svg" alt="Watch time: 19m 59s · 2 videos" width="202" height="20"></a>Add ?speed=1.5 to the image URL for the time at that speed, ?label=Course to change the left text, or ?style=flat-square for square corners.
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Data from the YouTube Data API as of 2026-09-22 (cached). Private or deleted videos are excluded from totals.