The video owner has disabled playback on external websites.

This video is no longer available on YouTube.

This video cannot be played right now.

Watch on YouTube

Desbloqueie ferramentas de aprendizado com IA

Cadastre-se para acessar ferramentas poderosas que ajudam a aprender mais rápido com cada vídeo.

Explicador de cena Caça-frases Revisão com flashcards Prática de repetição Falar de Volta
Cadastrar grátis
B1 Intermediário Inglês 5:03 Educational

How do airplanes actually fly? - Raymond Adkins

TED-Ed · 2,277,313 visualizações · Adicionado há 3 semanas

Estatísticas de aprendizado

B1

Nível CEFR

5/10

Dificuldade

Legendas (82 segmentos)

00:07

By 1917, Albert Einstein had explained the relationship between space and time.

00:13

But, that year, he designed a flawed airplane wing.

00:17

His attempt was based on an incomplete theory of flight.

00:20

Indeed, insufficient and inaccurate explanations still circulate today.

00:26

So, where did Einstein go wrong?

00:29

And how do planes fly?

00:32

Though we don’t always think of it this way, air is a fluid medium—

00:36

it’s just less dense than liquids like water.

00:39

Things that are lighter than air are buoyant within it,

00:42

while heavier objects require an upward force, called lift, to stay aloft.

00:48

For planes, this force is mostly generated by the wings.

00:52

One especially pervasive false description of lift

00:55

is the “Longer Path” or “Equal Transit Time” explanation.

00:59

It states that air molecules traveling over the top of a curved wing

01:03

cover a longer distance than those traveling underneath.

01:07

For the air molecules above to reach the wing’s trailing edge

01:11

in the same instance as those that split off and went below,

Legendas completas disponíveis no player de vídeo

Pratique com exercícios

Gere exercícios de vocabulário, gramática e compreensão deste vídeo

Vocabulário e gramática Quiz de compreensão Exame IELTS Prática de escrita
Cadastre-se pra praticar
Nenhum comentário ainda. Seja o primeiro a compartilhar suas ideias!

Cadastre-se para desbloquear todos os recursos

Acompanhe seu progresso, salve vocabulário e pratique com exercícios

Aprenda idiomas de grátis