The NUMB3RS Behind Rock Skipping
Kirt's Cogitations™ #104

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The NUMB3RS Behind Rock Skipping

Skiffing, smutting, ricochet, "ducks and drakes." Those are all names for the art of rock skipping. It is now as much of a science as an art, thanks to physicist Lyderic Bocquet and his young son. Mr. Bocquet formulated equations of motion for stones, modeling them as a thin, flat object bouncing off a uniform surface. He discovered that the stones initial rate of speed and spin rate were the biggest factors in the stone's ability to skip multiple times. A high rate of spin generates a gyroscopic effect that prevents the stone from tumbling and diving into the water. Per his equations, the world record of 38 skips corresponds to a stone flying 12 meters while spinning at a rate of 14 revolutions/second.

A huge collection of my 'Factoids' can be accessed from my 'Kirt's Cogitations' table of contents.

Topical Smorgasbord, another manifestation of Factoids, are be found on these pages:

| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 |
| 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 |

All pertain to topics that are related to the general engineering and science theme of RF Cafe.