How do airplanes actually fly? - Raymond Adkins

1,997,879 views ใƒป 2023-02-09

TED-Ed


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

๋ฒˆ์—ญ: ์œ ๊ฒฝ ์ด ๊ฒ€ํ† : DK Kim
00:07
By 1917, Albert Einstein had explained the relationship between space and time.
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1917๋…„, ์•Œ๋ฒ ๋ฅดํŠธ ์•„์ธ์Šˆํƒ€์ธ์€ ์‹œ๊ฐ„๊ณผ ๊ณต๊ฐ„์˜ ๊ด€๊ณ„๋ฅผ ์„ค๋ช…ํ–ˆ์Šต๋‹ˆ๋‹ค.
00:13
But, that year, he designed a flawed airplane wing.
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ํ•˜์ง€๋งŒ ๊ฐ™์€ ํ•ด์— ์ง์ ‘ ๊ณ ์•ˆํ•œ ๋น„ํ–‰๊ธฐ ๋‚ ๊ฐœ์—๋Š” ๊ฒฐํ•จ์ด ์žˆ์—ˆ์ฃ .
00:17
His attempt was based on an incomplete theory of flight.
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๋ถˆ์™„์ „ํ•œ ๋น„ํ–‰ ์ด๋ก ์— ๊ทผ๊ฑฐํ•ด ๋””์ž์ธ์„ ํ–ˆ๊ธฐ ๋•Œ๋ฌธ์ž…๋‹ˆ๋‹ค.
00:20
Indeed, insufficient and inaccurate explanations still circulate today.
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์‚ฌ์‹ค ์˜ค๋Š˜๋‚ ์—๋„ ๋ถˆ์ถฉ๋ถ„ํ•˜๊ณ  ์ž˜๋ชป๋œ ๋น„ํ–‰ ์ด๋ก ๋“ค์ด ์—ฌ์ „ํžˆ ๋– ๋Œ๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค.
00:26
So, where did Einstein go wrong?
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๊ทธ๋Ÿผ ์•„์ธ์Šˆํƒ€์ธ์€ ๋ฌด์—‡์„ ๋†“์ณค์„๊นŒ์š”?
00:29
And how do planes fly?
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๊ทธ๋ฆฌ๊ณ  ๋น„ํ–‰๊ธฐ๋Š” ์–ด๋–ป๊ฒŒ ๋‚˜๋Š” ๊ฑธ๊นŒ์š”?
00:32
Though we donโ€™t always think of it this way, air is a fluid mediumโ€”
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์šฐ๋ฆฌ๊ฐ€ ํ•ญ์ƒ ์˜์‹ํ•˜์ง€๋Š” ์•Š์ง€๋งŒ ๊ณต๊ธฐ๋Š” ์œ ์ฒด์ž…๋‹ˆ๋‹ค.
00:36
itโ€™s just less dense than liquids like water.
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๋‹จ์ง€ ๋ฌผ ๊ฐ™์€ ์•ก์ฒด๋ณด๋‹ค ๋ฐ€๋„๊ฐ€ ๋‚ฎ์„ ๋ฟ์ด์ฃ .
00:39
Things that are lighter than air are buoyant within it,
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๊ณต๊ธฐ๋ณด๋‹ค ๊ฐ€๋ฒผ์šด ๊ฒƒ์€ ๊ณต๊ธฐ ์ค‘์— ๋œจ์ง€๋งŒ
00:42
while heavier objects require an upward force, called lift, to stay aloft.
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๋” ๋ฌด๊ฑฐ์šด ๋ฌผ์ฒด๊ฐ€ ๋–  ์žˆ์œผ๋ ค๋ฉด ์–‘๋ ฅ์ด๋ผ๋Š” ์ƒ์Šน๋ ฅ์ด ์žˆ์–ด์•ผ ํ•ฉ๋‹ˆ๋‹ค.
00:48
For planes, this force is mostly generated by the wings.
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๋น„ํ–‰๊ธฐ์—์„œ๋Š” ์ฃผ๋กœ ๋‚ ๊ฐœ์—์„œ ์–‘๋ ฅ์ด ์ƒ๊น๋‹ˆ๋‹ค.
00:52
One especially pervasive false description of lift
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์–‘๋ ฅ์˜ ์›์ธ์œผ๋กœ ๋„๋ฆฌ ํผ์ง„ ์ž˜๋ชป๋œ ์ด๋ก ์€
00:55
is the โ€œLonger Pathโ€ or โ€œEqual Transit Timeโ€ explanation.
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โ€˜๊ธด ๊ฒฝ๋กœโ€™ ์ด๋ก  ํ˜น์€ โ€˜๋™์‹œ ํ†ต๊ณผโ€™ ์ด๋ก ์ž…๋‹ˆ๋‹ค.
00:59
It states that air molecules traveling over the top of a curved wing
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์ด ์ด๋ก ์— ๋”ฐ๋ฅด๋ฉด ๊ณก๋ฉด ๋‚ ๊ฐœ ์œ„๋กœ ์ง€๋‚˜๊ฐ€๋Š” ๊ณต๊ธฐ ๋ถ„์ž๊ฐ€
01:03
cover a longer distance than those traveling underneath.
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์•„๋ž˜๋กœ ์ง€๋‚˜๊ฐ€๋Š” ๊ณต๊ธฐ ๋ถ„์ž๋ณด๋‹ค ๋” ๋จผ ๊ฑฐ๋ฆฌ๋ฅผ ์ด๋™ํ•ฉ๋‹ˆ๋‹ค.
01:07
For the air molecules above to reach the wingโ€™s trailing edge
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๊ณต๊ธฐ ๋ถ„์ž๊ฐ€ ์œ„์•„๋ž˜๋กœ ๋‚˜๋‰˜์–ด ํ๋ฅผ ๋•Œ ์œ„๋กœ ์ง€๋‚˜๊ฐ€๋Š” ๊ณต๊ธฐ ๋ถ„์ž๊ฐ€
01:11
in the same instance as those that split off and went below,
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์•„๋ž˜๋กœ ์ง€๋‚˜๊ฐ€๋Š” ๊ณต๊ธฐ ๋ถ„์ž์™€ ๊ฐ™์€ ์‹œ์ ์— ๋‚ ๊ฐœ ๋์— ๋„๋‹ฌํ•˜๋ ค๋ฉด
01:14
air must travel faster above,
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์•„๋ž˜์ชฝ์— ๋น„ํ•ด ๋” ๋นจ๋ฆฌ ํ˜๋Ÿฌ์•ผ ํ•˜๊ณ 
01:17
creating a pocket of lower pressure that lifts the plane.
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๊ทธ ๊ฒฐ๊ณผ ๋น„ํ–‰๊ธฐ๋ฅผ ๋“ค์–ด ์˜ฌ๋ฆฌ๋Š” ๋‚ฎ์€ ์••๋ ฅ์ด ํ˜•์„ฑ๋ฉ๋‹ˆ๋‹ค.
01:20
This explanation has been thoroughly debunked.
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์ด ์„ค๋ช…์€ ๋ชจ๋“  ๋ฉด์—์„œ ๊ฑฐ์ง“์œผ๋กœ ํŒ๋ช…๋˜์—ˆ์Šต๋‹ˆ๋‹ค.
01:24
Air molecules floating above and below the wing don't need to meet back up.
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๋‚ ๊ฐœ ์œ„์•„๋ž˜๋กœ ํ๋ฅด๋Š” ๊ณต๊ธฐ ๋ถ„์ž๋Š” ๋‚ ๊ฐœ ๋์—์„œ ๋‹ค์‹œ ๋งŒ๋‚˜์ง€ ์•Š์ฃ .
01:29
In reality, the air traveling above reaches the wingโ€™s trailing edge
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์‹ค์ œ๋กœ๋Š” ๋‚ ๊ฐœ ์œ„๋กœ ํ๋ฅด๋Š” ๊ณต๊ธฐ๊ฐ€ ์•„๋ž˜๋กœ ํ๋ฅด๋Š” ๊ณต๊ธฐ๋ณด๋‹ค
01:34
much faster than the air beneath.
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ํ›จ์”ฌ ๋” ๋น ๋ฅด๊ฒŒ ๋‚ ๊ฐœ ๋์— ๋„๋‹ฌํ•ฉ๋‹ˆ๋‹ค.
01:37
To get a sense of how lift is actually generated,
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์‹ค์ œ๋กœ ์–‘๋ ฅ์ด ์–ด๋–ป๊ฒŒ ์ƒ์„ฑ๋˜๋Š”์ง€ ๋ณด๊ธฐ ์œ„ํ•ด
01:40
let's simulate an airplane wing in motion.
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๋น„ํ–‰ ์ค‘์— ๋น„ํ–‰๊ธฐ ๋‚ ๊ฐœ์— ์ƒ๊ธฐ๋Š” ์ผ์„ ์ƒ๊ฐํ•ด๋ด…์‹œ๋‹ค.
01:43
As it moves forward, the wing affects the movement of the air around it.
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๋‚ ๊ฐœ๋Š” ์•ž์œผ๋กœ ์ด๋™ํ•˜๋ฉด์„œ ์ฃผ๋ณ€ ๊ณต๊ธฐ ์›€์ง์ž„์— ์˜ํ–ฅ์„ ๋ฏธ์นฉ๋‹ˆ๋‹ค.
01:47
As air meets the wingโ€™s solid surface, a thin layer sticks to the wing.
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๊ณต๊ธฐ๊ฐ€ ๋‹จ๋‹จํ•œ ๋‚ ๊ฐœ ํ‘œ๋ฉด๊ณผ ๋งŒ๋‚˜๋ฉด ์–‡์€ ๊ณต๊ธฐ ์ธต์ด ๋‚ ๊ฐœ์— ๋‹ฌ๋ผ๋ถ™๋Š”๋ฐ
01:53
This layer pulls the surrounding air with it.
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์ด ๊ณต๊ธฐ ์ธต์ด ์ฃผ๋ณ€ ๊ณต๊ธฐ๋ฅผ ๋Œ์–ด๋‹น๊ธฐ์ฃ .
01:56
The air splits into pathways above and below the wing,
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๊ณต๊ธฐ๋Š” ๋‚ ๊ฐœ ์œ„์•„๋ž˜๋กœ ๋‚˜๋‰˜์–ด
01:59
following the wingโ€™s contour.
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๋‚ ๊ฐœ์˜ ํ‘œ๋ฉด์„ ๋”ฐ๋ผ ํ˜๋Ÿฌ๊ฐ‘๋‹ˆ๋‹ค.
02:01
As the air thatโ€™s routed above makes its way around the nose of the wing,
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์œ„๋กœ ์ง€๋‚˜๊ฐ€๋Š” ๊ณต๊ธฐ๊ฐ€ ๋‚ ๊ฐœ ์•ž ๋ถ€๋ถ„์„ ๋”ฐ๋ผ ํ๋ฅด๋ฉด
02:06
it experiences centripetal acceleration,
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๊ตฌ์‹ฌ ๊ฐ€์†๋„๊ฐ€ ์ƒ๊ธฐ๋Š”๋ฐ
02:09
the force you also feel in a sharply turning car.
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๊ธ‰ํ•˜๊ฒŒ ๋ฐฉํ–ฅ์„ ๋ฐ”๊พธ๋Š” ์ž๋™์ฐจ ์•ˆ์—์„œ ๋А๋ผ๋Š” ํž˜๊ณผ ๊ฐ™์ฃ .
02:12
The air above therefore gathers more speed than the air traveling below.
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๋”ฐ๋ผ์„œ ๋‚ ๊ฐœ ์œ„๋กœ ํ๋ฅด๋Š” ๊ณต๊ธฐ๋Š” ์•„๋ž˜์ชฝ๋ณด๋‹ค ์†๋„๊ฐ€ ๋” ๋ถ™์Šต๋‹ˆ๋‹ค.
02:17
This increased speed is coupled with a decrease in pressure above the wing,
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๊ณต๊ธฐ ํ๋ฆ„ ์†๋„๊ฐ€ ๋นจ๋ผ์ง€๋ฉด ๋‚ ๊ฐœ ์œ—๋ฉด์˜ ์••๋ ฅ์ด ๋‚ฎ์•„์ง€๋ฉด์„œ
02:22
which pulls even more air across the wingโ€™s upper surface.
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์ฃผ๋ณ€ ๊ณต๊ธฐ๋ฅผ ๋‚ ๊ฐœ ์œ—๋ฉด์œผ๋กœ ๋”์šฑ๋” ๊ฐ•ํ•˜๊ฒŒ ๋Œ์–ด๋‹น๊น๋‹ˆ๋‹ค.
02:27
The air flowing across the lower surface, meanwhile,
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๋ฐ˜๋ฉด์— ๋‚ ๊ฐœ ์•„๋ž˜๋กœ ํ๋ฅด๋Š” ๊ณต๊ธฐ๋Š”
02:30
experiences less of a change in direction and speed.
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๋ฐฉํ–ฅ๊ณผ ์†๋ ฅ์ด ํฌ๊ฒŒ ๋‹ฌ๋ผ์ง€์ง€ ์•Š์Šต๋‹ˆ๋‹ค.
02:34
The pressure across the wingโ€™s lower surface is thus higher
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๊ทธ๋Ÿฌ๋ฏ€๋กœ ๋‚ ๊ฐœ ์•„๋žซ๋ฉด์˜ ์••๋ ฅ์€
02:37
than that above the upper surface.
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์œ—๋ฉด์˜ ์••๋ ฅ๋ณด๋‹ค ๋†’์•„์ง€๊ณ 
02:40
This pressure difference results in the upwards force of lift.
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๋ฐ”๋กœ ์ด ์••๋ ฅ์ฐจ๊ฐ€ ์–‘๋ ฅ์ด๋ผ๋Š” ์ƒ์Šน๋ ฅ์„ ๋งŒ๋“ค์–ด ๋ƒ…๋‹ˆ๋‹ค.
02:44
The faster the plane travels,
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๋น„ํ–‰๊ธฐ๊ฐ€ ๋” ๋นจ๋ฆฌ ๋‹ฌ๋ฆด์ˆ˜๋ก
02:46
the greater the pressure difference, and the greater that force.
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์••๋ ฅ์ฐจ๊ฐ€ ๋” ์ปค์ง€๊ณ  ์–‘๋ ฅ๋„ ๋” ์ปค์ง‘๋‹ˆ๋‹ค.
02:49
Once it overcomes the downward force of gravity,
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์–‘๋ ฅ์ด ์ค‘๋ ฅ์ด๋ผ๋Š” ํ•˜๊ฐ•๋ ฅ๋ณด๋‹ค ์ปค์งˆ ๋•Œ ๋น„ํ–‰๊ธฐ๊ฐ€ ์ด๋ฅ™ํ•˜๋Š” ๊ฑฐ์ฃ .
02:52
the plane takes off.
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02:54
Air flows smoothly around curved wings.
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๊ณต๊ธฐ๋Š” ๊ณก์„ ์œผ๋กœ ๋œ ๋‚ ๊ฐœ ์ฃผ์œ„๋ฅผ ๋”ฐ๋ผ ๋ถ€๋“œ๋Ÿฝ๊ฒŒ ํ๋ฆ…๋‹ˆ๋‹ค.
02:57
But a wingโ€™s curvature is not the cause of lift.
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ํ•˜์ง€๋งŒ ๋‚ ๊ฐœ์˜ ๊ณก๋ฅ  ๋•Œ๋ฌธ์— ์–‘๋ ฅ์ด ์ƒ๊ธฐ๋Š” ๊ฒƒ์€ ์•„๋‹™๋‹ˆ๋‹ค.
03:01
In fact, a flat wing thatโ€™s tilted upwards can also create liftโ€”
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์‚ฌ์‹ค, ์œ„์ชฝ์œผ๋กœ ์ –ํ˜€์ง„ ํ‰ํ‰ํ•œ ๋‚ ๊ฐœ๋„ ์–‘๋ ฅ์„ ์ƒ์„ฑํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.
03:05
as long as the air bends around it,
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๊ณต๊ธฐ๊ฐ€ ๋‚ ๊ฐœ ์ฃผ๋ณ€์œผ๋กœ ํœ˜์–ด์ ธ
03:08
contributing to and reinforcing the pressure difference.
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์••๋ ฅ์ฐจ๋ฅผ ๋งŒ๋“ค๊ณ  ํ‚ค์šฐ๊ธฐ๋งŒ ํ•˜๋ฉด ๋˜์ฃ .
03:12
Meanwhile, having a wing thatโ€™s too curved or steeply angled
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๊ทธ๋Ÿฐ๋ฐ ๋‚ ๊ฐœ๊ฐ€ ๋„ˆ๋ฌด ๊ตฌ๋ถ€๋Ÿฌ์ง€๊ฑฐ๋‚˜ ๊ฐ€ํŒŒ๋ฅด๊ฒŒ ๊ธฐ์šธ์–ด์ง€๋ฉด ์ข‹์ง€ ์•Š์Šต๋‹ˆ๋‹ค.
03:16
can be disastrous:
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03:17
the airflow above may detach from the wing and become turbulent.
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๋‚ ๊ฐœ ์œ—๋ฉด์˜ ๊ธฐ๋ฅ˜๊ฐ€ ๋‚ ๊ฐœ์™€ ๋ถ„๋ฆฌ๋˜๋ฉด์„œ ๋‚œ๋ฅ˜๊ฐ€ ์ƒ๊ธธ ์ˆ˜๋„ ์žˆ์Šต๋‹ˆ๋‹ค.
03:22
This is probably what happened with Einsteinโ€™s wing design,
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์•„์ธ์Šˆํƒ€์ธ์ด ๊ณ ์•ˆํ•œ ๋‚ ๊ฐœ์ธ โ€˜๊ณ ์–‘์ด ๋“ฑโ€™์ด๋ผ๋Š” ๋ณ„๋ช…์˜ ๋””์ž์ธ๋„
03:25
nicknamed โ€œthe catโ€™s back.โ€
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์ด๋Ÿฐ ๋ฌธ์ œ์˜€์„ ๊ฒ๋‹ˆ๋‹ค.
03:28
By increasing the wingโ€™s curvature,
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์•„์ธ์Šˆํƒ€์ธ์€ ๋‚ ๊ฐœ์˜ ๊ณก๋ฅ ์ด ์ปค์งˆ์ˆ˜๋ก
03:30
Einstein thought it would generate more lift.
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๋” ํฐ ์–‘๋ ฅ์ด ์ƒ์„ฑ๋˜๋ฆฌ๋ผ ์ƒ๊ฐํ–ˆ์Šต๋‹ˆ๋‹ค.
03:32
But one test pilot reported that the plane wobbled
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ํ•˜์ง€๋งŒ ํ•œ ์‹œํ—˜ ๋น„ํ–‰ ์กฐ์ข…์‚ฌ๋Š”
๋น„ํ–‰๊ธฐ๊ฐ€ ๋ฐฐ๊ฐ€ ๋‚˜์˜จ ์˜ค๋ฆฌ์ฒ˜๋Ÿผ ํ”๋“ค๊ฑฐ๋ ธ๋‹ค๊ณ  ๋ณด๊ณ ํ–ˆ์Šต๋‹ˆ๋‹ค.
03:36
like โ€œa pregnant duckโ€ in flight.
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03:39
Our explanation is still a simplified description
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์ง€๊ธˆ๊นŒ์ง€์˜ ์„ค๋ช…์€ ์ด์ฒ˜๋Ÿผ ๋ฏธ๋ฌ˜ํ•˜๊ณ  ๋ณต์žกํ•œ ๊ณผ์ •์„
03:42
of this nuanced, complex process.
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๋‹จ์ˆœํ™”ํ•ด์„œ ์„ค๋ช…ํ•˜๋Š” ๊ฒƒ์ž…๋‹ˆ๋‹ค.
03:44
Other factors, like the air thatโ€™s flowing meters beyond the wingโ€™s surfaceโ€”
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๋‹ค๋ฅธ ์š”์†Œ๋“ค, ์˜ˆ์ปจ๋Œ€ ๋‚ ๊ฐœ ํ‘œ๋ฉด์—์„œ ๋ช‡ ๋ฏธํ„ฐ ๋„˜๊ฒŒ ๋–จ์–ด์ ธ์„œ ํ˜๋Ÿฌ๊ฐ€๋Š” ๊ณต๊ธฐ,
03:48
being swept up, then downโ€”
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์œ„๋กœ ์น˜์†Ÿ์•˜๋‹ค๊ฐ€ ๋–จ์–ด์ง€์ฃ ,
03:50
as well as air vortices formed at the wingโ€™s tips,
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๋‚ ๊ฐœ ๋์—์„œ ํ˜•์„ฑ๋˜๋Š” ๊ณต๊ธฐ ์™€๋ฅ˜ ๋“ฑ
03:54
all influence lift.
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๋ชจ๋“  ์š”์†Œ๊ฐ€ ์–‘๋ ฅ์— ์˜ํ–ฅ์„ ์ค๋‹ˆ๋‹ค.
03:56
And, while experts agree that the pressure difference generates lift,
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์ „๋ฌธ๊ฐ€๋“ค์€ ์••๋ ฅ์ฐจ๊ฐ€ ์–‘๋ ฅ์„ ์ƒ์„ฑํ•œ๋‹ค๋Š” ๋ฐ์—๋Š” ๋™์˜ํ•˜์ง€๋งŒ
03:59
their explanations for how can vary.
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์••๋ ฅ์ฐจ๊ฐ€ ์ƒ์„ฑ๋˜๋Š” ๊ณผ์ •์€ ์ €๋งˆ๋‹ค ์„ค๋ช…์ด ๋‹ค๋ฆ…๋‹ˆ๋‹ค.
04:02
Some might emphasize the airโ€™s behavior at the wingโ€™s surface,
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์–ด๋–ค ์‚ฌ๋žŒ๋“ค์€ ๋‚ ๊ฐœ ํ‘œ๋ฉด์—์„œ ๋ฐœ์ƒํ•˜๋Š” ๊ณต๊ธฐ์˜ ์›€์ง์ž„์„ ๊ฐ•์กฐํ•˜๊ณ 
04:06
others the upward force created as the air is deflected downwards.
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์ผ๋ถ€๋Š” ๊ณต๊ธฐ๊ฐ€ ์•„๋ž˜์ชฝ์œผ๋กœ ๊บพ์ด๋ฉด์„œ ์ƒ๊ธฐ๋Š” ์ƒ์Šน๋ ฅ์„ ๊ฐ•์กฐํ•˜์ฃ .
04:10
However, there's no controversy when it comes to the math.
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ํ•˜์ง€๋งŒ ์ˆ˜ํ•™์ ์œผ๋กœ ์ ‘๊ทผํ•˜๋ฉด ๋…ผ๋ž€์˜ ์—ฌ์ง€๊ฐ€ ์—†์Šต๋‹ˆ๋‹ค.
04:14
Engineers use a set of formulas called the Navier-Stokes equations
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๊ณตํ•™์ž๋“ค์€ ๋‚˜๋น„์—-์Šคํ† ํฌ์Šค ๋ฐฉ์ •์‹์ด๋ผ๋Š” ์ˆ˜์‹์„ ์‚ฌ์šฉํ•ด
04:18
to precisely model airโ€™s flow around a wing
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๋‚ ๊ฐœ ์ฃผ๋ณ€์˜ ๊ณต๊ธฐ ํ๋ฆ„์„ ์ •ํ™•ํ•˜๊ฒŒ ํ‘œํ˜„ํ•˜๊ณ 
04:21
and detail how lift is generated.
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์–ด๋–ป๊ฒŒ ์–‘๋ ฅ์ด ์ƒ๊ธฐ๋Š”์ง€ ์ž์„ธํžˆ ์„ค๋ช…ํ•ฉ๋‹ˆ๋‹ค.
04:24
More than a century after Einsteinโ€™s foray into aeronautics,
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์•„์ธ์Šˆํƒ€์ธ์ด ํ•ญ๊ณตํ•™ ๋ถ„์•ผ๋กœ ๋›ฐ์–ด๋“  ์ง€ 1์„ธ๊ธฐ๊ฐ€ ๋„˜์—ˆ์ง€๋งŒ
04:28
lift retains its reputation as a confounding concept.
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์–‘๋ ฅ์€ ์—ฌ์ „ํžˆ ํ˜ผ๋ž€์Šค๋Ÿฌ์šด ๊ฐœ๋…์ž…๋‹ˆ๋‹ค.
04:33
But when it feels like itโ€™s all going to come crashing down, remember:
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๊ณง ์ถ”๋ฝํ•  ๊ฒƒ๋งŒ ๊ฐ™์„ ๋•Œ๋Š” ๊ธฐ์–ตํ•˜์„ธ์š”.
04:36
itโ€™s just the physics of fluid in motion.
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๋‹จ์ง€ ์œ ์ฒด ์—ญํ•™์ผ ๋ฟ์ž…๋‹ˆ๋‹ค.
04:42
This video was made possible with support from Marriott Hotels.
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์ด ์˜์ƒ์€ ๋ฉ”๋ฆฌ์–ดํŠธ ํ˜ธํ…”์˜ ์ง€์›์„ ๋ฐ›์•„ ์ œ์ž‘ํ•˜์˜€์Šต๋‹ˆ๋‹ค.
04:46
With over 590 hotels and resorts across the globe,
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์ „ ์„ธ๊ณ„์— 590๊ฐœ๊ฐ€ ๋„˜๋Š” ํ˜ธํ…”๊ณผ ๋ฆฌ์กฐํŠธ๋ฅผ ๋ณด์œ ํ•œ ๋ฉ”๋ฆฌ์–ดํŠธ ํ˜ธํ…”์€
04:50
Marriott Hotels celebrates the curiosity that propels us to travel.
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์šฐ๋ฆฌ๊ฐ€ ์—ฌํ–‰์„ ๋– ๋‚˜๊ฒŒ ํ•˜๋Š” ํ˜ธ๊ธฐ์‹ฌ์„ ์ž๊ทนํ•ฉ๋‹ˆ๋‹ค.
04:54
Check out some of the exciting ways TED-Ed and Marriott are working together,
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TED-Ed์™€ ๋ฉ”๋ฆฌ์–ดํŠธ๊ฐ€ ํ•จ๊ป˜ํ•œ ํฅ๋ฏธ๋กœ์šด ์ด์•ผ๊ธฐ๋“ค์„ ์‚ดํŽด๋ณด๊ณ 
04:58
and book your next journey at Marriott Hotels.
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๋ฉ”๋ฆฌ์–ดํŠธ ํ˜ธํ…”๊ณผ ์ƒˆ๋กœ์šด ์—ฌํ–‰์„ ๋– ๋‚˜ ๋ณด์„ธ์š”.
์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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