How rollercoasters affect your body - Brian D. Avery

2,485,702 views ใƒป 2018-10-29

TED-Ed


์•„๋ž˜ ์˜๋ฌธ์ž๋ง‰์„ ๋”๋ธ”ํด๋ฆญํ•˜์‹œ๋ฉด ์˜์ƒ์ด ์žฌ์ƒ๋ฉ๋‹ˆ๋‹ค.

๋ฒˆ์—ญ: Jihyeon J. Kim ๊ฒ€ํ† : Won Jang
00:06
In the summer of 1895, crowds flooded the Coney Island boardwalk
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1895๋…„ ์—ฌ๋ฆ„, ์ฝ”๋‹ˆ ์•„์ผ๋žœ๋“œ์— ์‚ฌ๋žŒ๋“ค์ด ๋ชฐ๋ ค๋“ค์–ด
00:12
to see the latest marvel of roller coaster technology:
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์ตœ์‹  ๋กค๋Ÿฌ์ฝ”์Šคํ„ฐ ๊ธฐ์ˆ ์„ ๋ณด๋Ÿฌ ์™”์Šต๋‹ˆ๋‹ค.
00:16
the Flip Flap Railway.
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ํ”Œ๋ฆฝ ํ”Œ๋žฉ ๋ ˆ์ผ์›จ์ด์ฃ .
00:18
This was Americaโ€™s first-ever looping coaster
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๋ฏธ๊ตญ ์ตœ์ดˆ์˜ ๋กค๋Ÿฌ์ฝ”์Šคํ„ฐ์˜€์ง€๋งŒ
00:21
โ€“ but its thrilling flip came at a price.
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์งœ๋ฆฟํ•œ ๊ณก์˜ˆ๋Š” ๋Œ€๊ฐ€๋ฅผ ์น˜๋Ÿฌ์•ผ ํ–ˆ์Šต๋‹ˆ๋‹ค.
00:24
The ride caused numerous cases of severe whiplash,
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์ด ๋†€์ด๊ธฐ๊ตฌ๋Š” ์‹ฌ๊ฐํ•œ ํŽธํƒ€์„ฑ ์†์ƒ์ด๋‚˜
00:28
neck injury and even ejections,
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๋ชฉ ๋ถ€์ƒ์„ ์œ ๋ฐœํ•˜๊ฑฐ๋‚˜ ์‹ฌ์ง€์–ด ์‚ฌ๋žŒ์„ ํŠ•๊ฒจ๋‚ด๊ธฐ๋„ ํ–ˆ์Šต๋‹ˆ๋‹ค.
00:31
all due to its signature loop.
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์ด ๋ชจ๋“  ๊ฒŒ ์ด ๊ธฐ๊ตฌ์˜ ํŠน์ง•์ ์ธ ํšŒ์ „๊ณ ๋ฆฌ ๋•Œ๋ฌธ์ด์—ˆ์ง€์š”.
00:33
Today, coasters can pull off far more exciting tricks,
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์˜ค๋Š˜๋‚  ๋กค๋Ÿฌ์ฝ”์Šคํ„ฐ๋Š” ํ›จ์”ฌ ๋” ์‹ ๋‚˜๋Š” ๋ฌ˜๊ธฐ๋ฅผ ๋ถ€๋ฆฌ๋Š”๋ฐ๋„
00:37
without resorting to the โ€œthrillโ€ of a hospital visit.
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๋ณ‘์› ์‹ ์„ธ๋ฅผ ์ง€์ง€ ์•Š์•„๋„ ๋ฉ๋‹ˆ๋‹ค.
00:40
But what exactly are roller coasters doing to your body,
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๊ทธ๋Ÿฐ๋ฐ ๋กค๋Ÿฌ์ฝ”์Šคํ„ฐ๊ฐ€ ๋ชธ์— ์–ด๋–ค ์˜ํ–ฅ์„ ์ฃผ๊ณ 
00:44
and how have they managed to get scarier and safer at the same time?
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์–ด๋–ป๊ฒŒ ๋” ์•ˆ์ „ํ•˜๋ฉด์„œ๋„ ๋ฌด์„œ์›Œ์งˆ ์ˆ˜ ์žˆ์—ˆ์„๊นŒ์š”?
00:48
At the center of every roller coaster design is gravity.
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๋ชจ๋“  ๋กค๋Ÿฌ์ฝ”์Šคํ„ฐ ์„ค๊ณ„์˜ ํ•ต์‹ฌ์€ ์ค‘๋ ฅ์ž…๋‹ˆ๋‹ค.
00:53
Unlike cars or transit trains,
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์ž๋™์ฐจ๋‚˜ ์ „์ฒ ๊ณผ๋Š” ๋‹ฌ๋ฆฌ
00:55
most coasters are propelled around their tracks
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๋Œ€๋ถ€๋ถ„์˜ ๋กค๋Ÿฌ์ฝ”์Šคํ„ฐ๋Š” ํŠธ๋ž™์„ ๋”ฐ๋ผ ์ถ”์ง„๋  ๋•Œ
00:58
almost entirely by gravitational energy.
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๊ฑฐ์˜ ์ค‘๋ ฅ ์—๋„ˆ์ง€๋งŒ์„ ๋ฐ›์Šต๋‹ˆ๋‹ค.
01:01
After the coaster crests the initial lift hill,
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๋กค๋Ÿฌ์ฝ”์Šคํ„ฐ๊ฐ€ ์ฒซ ๋ฒˆ์งธ ์ •์ƒ์— ์˜ฌ๋ผ๊ฐ€๋ฉด
01:04
it begins an expertly engineered cycle โ€“
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์ฒ ์ €ํ•˜๊ฒŒ ๊ณตํ•™์ ์œผ๋กœ ๊ณ„์‚ฐ๋œ ์ˆœํ™˜์„ ์‹œ์ž‘ํ•ฉ๋‹ˆ๋‹ค.
01:08
building potential energy on ascents and expending kinetic energy on descents.
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์ƒ์Šนํ•  ๋•Œ ์œ„์น˜ ์—๋„ˆ์ง€๋ฅผ ์ถ•์ ํ•˜๊ณ  ํ•˜๊ฐ•ํ•  ๋•Œ ์šด๋™ ์—๋„ˆ์ง€๋ฅผ ์“ฐ๋Š” ๊ฒƒ์ด์ง€์š”.
01:13
This rhythm repeats throughout the ride,
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์ด ๋ฆฌ๋“ฌ์ด ๋†€์ด๊ธฐ๊ตฌ๋ฅผ ํƒ€๋Š” ๋™์•ˆ ๋ฐ˜๋ณต๋ฉ๋‹ˆ๋‹ค.
01:16
acting out the coaster engineerโ€™s choreographed dance
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๋กค๋Ÿฌ์ฝ”์Šคํ„ฐ ์—”์ง€๋‹ˆ์–ด์˜ ์„ค๊ณ„๋Œ€๋กœ ์ค‘๋ ฅ ์—๋„ˆ์ง€๋ฅผ ๋ฐ›์€ ์ถค์„ ์ถ”์ฃ .
01:19
of gravitational energy.
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01:21
But thereโ€™s a key variable in this cycle that wasnโ€™t always so carefully considered:
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ํ•˜์ง€๋งŒ ์ด ์ฃผ๊ธฐ์—์„œ ์‹ ์ค‘ํ•˜๊ฒŒ ๊ณ ๋ ค๋˜์ง€ ์•Š์€ ํ•ต์‹ฌ ๋ณ€์ˆ˜๊ฐ€ ์žˆ๋Š”๋ฐ
01:26
you.
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๋ฐ”๋กœ ์—ฌ๋Ÿฌ๋ถ„์ž…๋‹ˆ๋‹ค.
01:27
In the days of the Flip-Flap,
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ํ”Œ๋ฆฝ ํ”Œ๋žฉ์ด ์žˆ๋˜ ์‹œ์ ˆ์—๋Š”
01:29
ride designers were most concerned with coasters getting stuck
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๋†€์ด๊ธฐ๊ตฌ ์„ค๊ณ„์ž๋Š” ๊ธฐ๊ตฌ๊ฐ€ ํŠธ๋ž™ ์–ด๋”˜๊ฐ€์— ๋ฉˆ์ถ”๊ฒŒ ๋  ๊ฒƒ์„ ๊ฐ€์žฅ ์‹ ๊ฒฝ์ผ์Šต๋‹ˆ๋‹ค.
01:32
somewhere along the track.
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01:34
This led early builders to overcompensate,
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๊ทธ๋ž˜์„œ ์ดˆ๊ธฐ ์„ค๊ณ„์ž๋“ค์€ ์ด๋ฅผ ๋ง‰๊ธฐ ์œ„ํ•ด ์ง€๋‚˜์น˜๊ฒŒ ์‹ ๊ฒฝ์„ ์ผ์Šต๋‹ˆ๋‹ค.
01:36
hurling trains down hills
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๊ธฐ๊ตฌ๊ฐ€ ๋น ๋ฅธ ์†๋„๋กœ ๋‚ด๋ ค ๊ฝ‚ํžˆ๊ฒŒ ํ•˜๊ณ 
01:38
and pulling on the brakes when they reached the station.
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์ •๊ฑฐ์žฅ์— ๋„์ฐฉํ–ˆ์„ ๋•Œ ๋ธŒ๋ ˆ์ดํฌ๋ฅผ ์žก์•„๋‹น๊ธฐ๋Š” ๊ฒƒ์ด์ฃ .
01:41
But as gravity affects the cars, it also affects the passengers.
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ํ•˜์ง€๋งŒ ์ค‘๋ ฅ์ด ๊ธฐ๊ตฌ์— ์ž‘์šฉํ•˜๋ฉด์„œ ํƒ‘์Šน์ž์—๊ฒŒ๋„ ์ž‘์šฉํ•ฉ๋‹ˆ๋‹ค.
01:45
And under the intense conditions of a coaster,
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๋กค๋Ÿฌ์ฝ”์Šคํ„ฐ์˜ ๊ฐ•๋ ฅํ•œ ์ƒํ™ฉ์—์„œ
01:48
gravityโ€™s effects are multiplied.
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์ค‘๋ ฅ์˜ ์˜ํ–ฅ์€ ๋ช‡ ๋ฐฐ๋กœ ์ฆ๊ฐ€ํ•ฉ๋‹ˆ๋‹ค.
01:50
Thereโ€™s a common unit used by jet pilots,
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์ œํŠธ๊ธฐ ์กฐ์ข…์‚ฌ,
01:53
astronauts,
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01:53
and coaster designers called โ€œg forceโ€.
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์šฐ์ฃผ ๋น„ํ–‰์‚ฌ์™€
๊ธฐ๊ตฌ ์„ค๊ณ„์ž๊ฐ€ ์“ฐ๋Š” "์ค‘๋ ฅ๊ฐ€์†๋„"๋ผ๋Š” ์ผ๋ฐ˜์  ๋‹จ์œ„๊ฐ€ ์žˆ์Šต๋‹ˆ๋‹ค.
01:57
One G force is the familiar tug of gravity you feel when standing on Earth
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1G ๋Š” ์ง€๊ตฌ์— ์„œ ์žˆ์„ ๋•Œ ๋Š๋ผ๋Š” ์ต์ˆ™ํ•œ ์ค‘๋ ฅ์ž…๋‹ˆ๋‹ค.
02:01
โ€“ this is the force of Earthโ€™s gravitational pull on our bodies.
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์ด๊ฒŒ ์šฐ๋ฆฌ ๋ชธ์— ์ž‘์šฉํ•˜๋Š” ์ง€๊ตฌ ์ค‘๋ ฅ์ด์ฃ .
02:05
But as riders accelerate and decelerate,
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ํ•˜์ง€๋งŒ ํƒ‘์Šน์ž๊ฐ€ ๊ฐ€์†ํ•˜๊ณ  ๊ฐ์†ํ•˜๋ฉด์„œ
02:08
they experience more or less gravitational force.
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์ค‘๋ ฅ์„ ๋” ๋˜๋Š” ๋œ ๊ฒฝํ—˜ํ•ฉ๋‹ˆ๋‹ค.
02:12
Modern ride designers know that the body can handle up to roughly 5 Gs,
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ํ˜„๋Œ€ ๊ธฐ๊ตฌ ์„ค๊ณ„์ž๋Š” ์‹ ์ฒด๊ฐ€ 5G๊นŒ์ง€๋งŒ ๊ฒฌ๋”œ ์ˆ˜ ์žˆ์Œ์„ ์•Œ์ง€๋งŒ
02:17
but the Flip-Flap and its contemporaries routinely reached up to 12 Gs.
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ํ”Œ๋ฆฝ ํ”Œ๋žฉ๊ณผ ๊ทธ ๋‹น์‹œ ๋†€์ด๊ธฐ๊ตฌ๋“ค์€ ๋ณดํ†ต 12G๊นŒ์ง€ ์˜ฌ๋ผ๊ฐ”์Šต๋‹ˆ๋‹ค.
02:22
At those levels of gravitational pressure,
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๊ทธ ์ •๋„ ์ˆ˜์ค€์˜ ์ค‘๋ ฅ์—์„œ๋Š”
02:24
blood is sent flying from your brain to your feet,
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๋‡Œ์—์„œ ๋ฐœ๋กœ ํ”ผ๊ฐ€ ๋ง‰ ์›€์ง์—ฌ์„œ
02:27
leading to light-headedness or blackouts
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ํ˜„๊ธฐ์ฆ์ด ๋‚˜๊ฑฐ๋‚˜ ์ •์‹ ์„ ์žƒ์Šต๋‹ˆ๋‹ค.
02:30
as the brain struggles to stay conscious.
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๋‡Œ๊ฐ€ ์ •์‹ ์„ ์ฐจ๋ฆฌ๋ ค๊ณ  ์• ์“ฐ๋ฉด์„œ์š”.
02:32
And oxygen deprivation in the retinal cells impairs their ability to process light,
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๋ง๋ง‰์„ธํฌ์˜ ์‚ฐ์†Œ ๋ถ€์กฑ์€ ๋น›์„ ์ฒ˜๋ฆฌํ•˜๋Š” ๋Šฅ๋ ฅ์„ ์•ฝํ™”์‹œ์ผœ์„œ
02:38
causing greyed out vision or temporary blindness.
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์‹œ์•ผ๊ฐ€ ํ๋ ค์ง€๊ฑฐ๋‚˜ ์ž ์‹œ ์•ˆ๋ณด์ด๊ฒŒ ๋ฉ๋‹ˆ๋‹ค.
02:41
If the riders are upside down, blood can flood the skull,
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ํƒ‘์Šน์ž๊ฐ€ ๊ฑฐ๊พธ๋กœ ์žˆ์œผ๋ฉด ํ”ผ๊ฐ€ ๋‘๊ฐœ๊ณจ๋กœ ํ๋ฅด๋ฉด์„œ
02:45
causing a bout of crimson vision called a โ€œredoutโ€.
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"๋ถ‰์€ ํ˜„๊ธฐ์ฆ"์ด๋ผ๋Š” ๋ถ‰์€ ์‹œ์•ผ ํ˜„์ƒ์„ ์ผ์œผํ‚ต๋‹ˆ๋‹ค.
02:49
Conversely, negative Gโ€™s create weightlessness.
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๋ฐ˜๋Œ€๋กœ, ๋งˆ์ด๋„ˆ์Šค G ๊ฐ’์€ ๋ฌด์ค‘๋ ฅ์„ ๋งŒ๋“ค์–ด๋‚ด์ฃ .
02:53
Within the body,
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์‹ ์ฒด ๋‚ด์—์„œ ๋‹จ๊ธฐ ๋ฌด์ค‘๋ ฅ์€ ๋Œ€๊ฐœ ๋ฌดํ•ดํ•ฉ๋‹ˆ๋‹ค.
02:54
short-term weightlessness is mostly harmless.
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02:57
It can contribute to a riderโ€™s motion sickness
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ํƒ‘์Šน์ž๊ฐ€ ๋ฉ€๋ฏธ๋ฅผ ๋Š๋‚„ ์ˆ˜ ๋Š” ์žˆ์Šต๋‹ˆ๋‹ค.
02:59
by suspending the fluid in their inner ears
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๊ท ํ˜•์„ ๋งž์ถฐ์ฃผ๋Š” ๊ท€ ๋‚ด๋ถ€์˜ ์•ก์ฒด๊ฐ€ ๋–  ์žˆ๊ธฐ ๋•Œ๋ฌธ์ด์ง€์š”.
03:02
which coordinates balance.
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03:03
But the bigger potential danger
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ํ•˜์ง€๋งŒ ๋” ํฐ ์ž ์žฌ์  ์œ„ํ—˜์„ฑ๊ณผ ์Šค๋ฆด์€
03:05
โ€“ and thrill โ€“
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03:06
comes from what ride designers call airtime.
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๋†€์ด๊ธฐ๊ตฌ ์„ค๊ณ„์ž๊ฐ€ ๊ณต์ค‘์‹œ๊ฐ„์ด๋ผ๊ณ  ๋ถ€๋ฅด๋Š” ๋ฐ์„œ ์ƒ๊น๋‹ˆ๋‹ค.
03:09
This is when riders typically experience seat separation,
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์ด๋Š” ํƒ‘์Šน์ž๊ฐ€ ์ขŒ์„์—์„œ ๋ถ„๋ฆฌ๋  ๋•Œ ์ƒ๊ธฐ๋Š”๋ฐ
03:13
and, without the proper precautions,
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์ ์ ˆํ•œ ์˜ˆ๋ฐฉ์กฐ์น˜๊ฐ€ ์—†์œผ๋ฉด
03:14
ejection.
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๋ฐ–์œผ๋กœ ํˆ‰๊ฒจ๋‚˜๊ฐ‘๋‹ˆ๋‹ค.
03:15
The numerous belts and harnesses of modern coasters
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ํ˜„๋Œ€์˜ ์ˆ˜๋งŽ์€ ๋ ์™€ ์•ˆ์ „๋ฒจํŠธ๊ฐ€
03:18
have largely solved this issue,
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์ด๋Ÿฐ ๋ฌธ์ œ๋ฅผ ๋Œ€๊ฐœ ํ•ด๊ฒฐํ–ˆ์ง€๋งŒ
03:20
but the passengerโ€™s ever-changing position can make it difficult
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ํƒ‘์Šน์ž์˜ ์œ„์น˜๊ฐ€ ์ž๊พธ ๋ฐ”๋€Œ๊ธฐ ๋•Œ๋ฌธ์—
์–ด๋””๋ฅผ ๋ฌถ์–ด์ค˜์•ผ ํ• ์ง€ ๊ฒฐ์ •ํ•˜๋Š” ๊ฒŒ ์–ด๋ ค์šธ ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.
03:24
to determine what needs to be strapped down.
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03:26
Fortunately, modern ride designers are well aware
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๋‹คํ–‰ํžˆ ํ˜„๋Œ€ ๋†€์ด๊ธฐ๊ตฌ ์„ค๊ณ„์ž๋“ค์€
03:29
of what your body, and the coaster,
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์‹ ์ฒด์™€ ๋†€์ด๊ธฐ๊ตฌ๊ฐ€ ์–ด๋””๊นŒ์ง€ ๋ฒ„ํ‹ธ ์ˆ˜ ์žˆ๋Š”์ง€ ์ž˜ ์•Œ๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค.
03:31
can handle.
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03:32
Coaster engineers play these competing forces against each other,
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๋กค๋Ÿฌ์ฝ”์Šคํ„ฐ ๊ณตํ•™์ž๋“ค์€ ์ด ์„œ๋กœ ๋ฐ˜๋Œ€๋˜๋Š” ํž˜๋“ค์„ ์กฐ์ ˆํ•˜๊ณ 
03:36
to relieve periods of intense pressure with periods of no pressure at all.
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๊ฐ•ํ•œ ์••๋ ฅ์˜ ์‹œ๊ฐ„๊ณผ ๋ฌด์••๋ ฅ์˜ ์‹œ๊ฐ„์˜ ๊ท ํ˜•์„ ๋งž์ถฅ๋‹ˆ๋‹ค.
03:40
And since a quick transition from positive to negative G-force
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ํ”Œ๋Ÿฌ์Šค G์—์„œ ๋งˆ์ด๋„ˆ์Šค Gํž˜์œผ๋กœ ๋น ๋ฅด๊ฒŒ ๋ฐ”๋€Œ๋ฉด
03:43
can result in whiplash, headaches, and back and neck pain,
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ํŽธํƒ€์„ฑ ์ƒํ•ด, ๋‘ํ†ต, ์š”ํ†ต๊ณผ ๋ชฉ ํ†ต์ฆ์ด ์ƒ๊ธธ ์ˆ˜ ์žˆ์–ด์„œ
03:47
they avoid the extreme changes in speed and direction
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์†๋„์™€ ๋ฐฉํ–ฅ์˜ ๊ทน๋‹จ์ ์ธ ๋ณ€ํ™”๋ฅผ ํ”ผํ•ฉ๋‹ˆ๋‹ค.
03:50
so common in thrill rides of old.
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์˜›๋‚ ์˜ ์Šค๋ฆด์žˆ๋Š” ๋†€์ด๊ธฐ๊ตฌ์—์„œ๋Š” ํ”ํ•œ ์ผ์ด์—ˆ์ฃ .
03:53
Modern rides are also much sturdier,
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์˜ค๋Š˜๋‚  ๋†€์ด๊ธฐ๊ตฌ๋Š” ํ›จ์”ฌ ํŠผํŠผํ•˜๊ณ 
03:56
closely considering the amount of gravity they need to withstand.
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๊ฒฌ๋ŽŒ์•ผํ•  ์ค‘๋ ฅ์„ ๋ฉด๋ฐ€ํžˆ ๊ฒ€ํ† ํ•ฉ๋‹ˆ๋‹ค.
03:59
At 5 Gโ€™s, your body feels 5 times heavier;
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5G์—์„œ ์‹ ์ฒด๋Š” 5๋ฐฐ ๋” ๋ฌด๊ฒ๊ฒŒ ๋Š๊ปด์ง‘๋‹ˆ๋‹ค.
04:03
so if you weigh 100lbs,
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์ฒด์ค‘์ด 100ํŒŒ์šด๋“œ(45kg)๋ผ๋ฉด
04:04
youโ€™d exert the weight of 500 lbs on the coaster.
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500ํŒŒ์šด๋“œ(225kg)์˜ ๋ฌด๊ฒŒ๋กœ ๋กค๋Ÿฌ์ฝ”์Šคํ„ฐ์— ์••๋ ฅ์„ ๊ฐ€ํ•˜๋Š” ๊ฑฐ์ฃ .
04:08
Engineers have to account for the multiplied weight
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์—”์ง€๋‹ˆ์–ด๋“ค์€ ๋กค๋Ÿฌ์ฝ”์Šคํ„ฐ ์ง€์ง€๋Œ€๋ฅผ ์„ค๊ณ„ํ•  ๋•Œ ํƒ‘์Šน์ž์˜ ์ฆ๋Œ€๋œ ์ฒด์ค‘์„ ๊ณ ๋ คํ•ด์•ผ ํ•ฉ๋‹ˆ๋‹ค.
04:11
of every passenger when designing a coasterโ€™s supports.
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04:15
Still, these rides arenโ€™t for everyone.
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๊ทธ๋ž˜๋„ ๋†€์ด๊ธฐ๊ตฌ๋ฅผ ๋ชจ๋‘๊ฐ€ ํƒˆ ์ˆ˜ ์žˆ๋Š” ๊ฑด ์•„๋‹™๋‹ˆ๋‹ค.
04:17
The floods of adrenaline, light-headedness, and motion sickness
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์•„๋“œ๋ ˆ๋‚ ๋ฆฐ์ด ์†Ÿ๊ตฌ์น˜๊ณ , ํ˜„๊ธฐ์ฆ๊ณผ ๋ฉ€๋ฏธ๊ฐ€ ๋‚˜๋Š” ๊ฑด
04:21
arenโ€™t going anywhere soon.
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๊ธˆ๋ฐฉ ์—†์–ด์ง€์ง€ ์•Š์„ ๊ฒ๋‹ˆ๋‹ค.
04:23
But todayโ€™s redundant restraints, 3D modeling and simulation software
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ํ•˜์ง€๋งŒ ์˜ค๋Š˜๋‚  ๊ณผ๋‹คํ•œ ์ œํ•œ๊ณผ 3D ๋ชจ๋ธ, ์‹œ๋ฎฌ๋ ˆ์ด์…˜ ์†Œํ”„ํŠธ์›จ์–ด๊ฐ€
04:28
have made roller coasters safer and more thrilling than ever.
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๋กค๋Ÿฌ์ฝ”์ŠคํŠธ๋ฅผ ์–ด๋Š ๋•Œ๋ณด๋‹ค ๋”์šฑ ์•ˆ์ „ํ•˜๊ณ  ์Šค๋ฆด์žˆ๊ฒŒ ํ•ด์คฌ์Šต๋‹ˆ๋‹ค.
04:32
Our precise knowledge about the limits of the human body
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์‹ ์ฒด์˜ ํ•œ๊ณ„์— ๋Œ€ํ•œ ์‚ฌ์ „ ์ง€์‹์ด
04:34
have helped us build coasters that are faster, taller, and loopier
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๋กค๋Ÿฌ์ฝ”์Šคํ„ฐ๋ฅผ ๋” ๋น ๋ฅด๊ณ , ๊ธธ๊ณ , ํšŒ์ „ํ•˜๋„๋ก ๋„์™€์คฌ์œผ๋ฉฐ
04:38
โ€“ and all without going off the rails.
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ํŠธ๋ž™์—์„œ ํƒˆ์„ ํ•˜์ง€ ์•Š๊ณ ๋„ ํ•  ์ˆ˜ ์žˆ์ฃ .
์ด ์›น์‚ฌ์ดํŠธ ์ •๋ณด

์ด ์‚ฌ์ดํŠธ๋Š” ์˜์–ด ํ•™์Šต์— ์œ ์šฉํ•œ YouTube ๋™์˜์ƒ์„ ์†Œ๊ฐœํ•ฉ๋‹ˆ๋‹ค. ์ „ ์„ธ๊ณ„ ์ตœ๊ณ ์˜ ์„ ์ƒ๋‹˜๋“ค์ด ๊ฐ€๋ฅด์น˜๋Š” ์˜์–ด ์ˆ˜์—…์„ ๋ณด๊ฒŒ ๋  ๊ฒƒ์ž…๋‹ˆ๋‹ค. ๊ฐ ๋™์˜์ƒ ํŽ˜์ด์ง€์— ํ‘œ์‹œ๋˜๋Š” ์˜์–ด ์ž๋ง‰์„ ๋”๋ธ” ํด๋ฆญํ•˜๋ฉด ๊ทธ๊ณณ์—์„œ ๋™์˜์ƒ์ด ์žฌ์ƒ๋ฉ๋‹ˆ๋‹ค. ๋น„๋””์˜ค ์žฌ์ƒ์— ๋งž์ถฐ ์ž๋ง‰์ด ์Šคํฌ๋กค๋ฉ๋‹ˆ๋‹ค. ์˜๊ฒฌ์ด๋‚˜ ์š”์ฒญ์ด ์žˆ๋Š” ๊ฒฝ์šฐ ์ด ๋ฌธ์˜ ์–‘์‹์„ ์‚ฌ์šฉํ•˜์—ฌ ๋ฌธ์˜ํ•˜์‹ญ์‹œ์˜ค.

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