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:
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4 | 5
| 6 | 7
| 8 | 9
| 10 |
11 | 12 |
13 | 14
| 15 |
16 | 17 |
18 | 19
| 20 |
21 | 22
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24 | 25 |
26 | 27
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29 | 30 |
31 | 32
| 33 |
34 | 35 |
All pertain to topics that are related to the general engineering and science theme
of RF Cafe.