Pratique du Shadowing: Power – Rate of Work - Apprendre l'anglais à l'oral avec la vidéo

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43 phrases
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1
Ever walked up a flight of stairs and wondered why running up feels so much harder?
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Think about what it takes to get up stairs.
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With every step, your muscles lift your body against gravity.
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If you ran up instead, you'd still have to lift your weight through the same height.
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That's where power comes in.
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Power tells us how quickly work is done.
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To find average power, divide the work by the time it takes.
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Work is measured in years, time in seconds, and power in watts.
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So, if you see a power rating of one watt, that means one gear of energy is transferred every second.
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Let's put some numbers to that.
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Imagine a climb that takes 1 ,200 years of work against gravity.
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If you take 12 seconds, your average power is 100 watts.
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What if you do that same climb in 6 seconds?
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Now you're doing 200 years of work each second.
15
Half the time, twice the power.
16
Imagine taking a ride in a sports car.
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The driver presses the accelerator and you feel yourself pressed back into the seat as the car picks up seats.
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The car is gaining kinetic energy.
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How quickly can its engine supply energy?
20
Take a 400 kilowatt engine.
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At full power, it can deliver 400 ,000 joules of mechanical energy every second.
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Now picture a standard halfback on an everyday drive.
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It can reach motorway speed, too.
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Suppose this engine is rated at 60 kW.
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At full power, that's 60 ,000 wheels every second.
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If the two cars have similar mass, they need roughly the same gain in kinetic energy to go from rest to motorway speed.
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With similar grip and losses, the more powerful car can get there seen.
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Now let's look at the world's fastest landowner, the Cheetah.
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Imagine how quickly it has to gather speed when it chases its head.
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In just a quick drive, its muscles give its body a big increase in kinetic energy.
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That's a burst of high power.
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Compare that with a hard -working husky.
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Picture it pulling a light sled along a snowy trail.
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Once the sled is gliding at a steady speed, is the husky still doing work?
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It is.
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The snow resists the sled's motion, so the husky has to keep pulling.
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Its talent is disdaining that effort over a long distance.
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Next time you head upstairs, Think about two questions.
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How much work does it take to lift you to the top?
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And how quickly do you do it?
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The first tells you about the energy changes.
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Put that together with the time taken and you have your average path.
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Thank you.

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Vocabulaire et conseils d’expression pour cette leçon

Cette leçon d’expression orale s’appuie sur la vidéo « Power – Rate of Work ». Les mots qui reviennent le plus souvent : energy, speed, quickly, husky, kinetic. Cette vidéo contient 43 phrases et 431 mots à répéter en shadowing. La partie parlée dure 3:26. Le locuteur parle à un rythme régulier d’environ 126 mots par minute, confortable pour le shadowing. 83 % des mots font partie des 3 000 mots les plus courants en anglais ; le reste mérite d’être vu avant de commencer.

Vocabulaire clé de cette vidéo

15 mots de la vidéo à retenir, avec leur prononciation et leur sens :

MotPrononciationSens
watt nom/wɑt/watt
muscle nom/ˈmʌs.əl/muscle
climb verbe/ˈklaɪ̯m/grimper, monter
gravity nom/ˈɡɹævɪti/gravité
rat nom/ɹæt/rat, souris
stairs nom/ˈstɛɹz/escalier
everyday adjectif/ˈɛvɹiˌdeɪ/usuel
gear nom/ɡɪɚ/panoplie, matériel
compare verbe/kəmˈpɛɚ/comparer
trail nom/tɹeɪl/piste, traces
chase verbe/t͡ʃeɪs/poursuivre, chasser
roughly adverbe/ˈɹʌf.li/rudement
mechanical adjectif/məˈkænəkəl/mécanique
steady adjectif/ˈstɪdi/lisse
gather verbe/ˈɡæðɚ/ramasser

Les verbes à particule que vous entendrez

MotSens
get up verbese lever
pick up verbesoulever

Prononciation à surveiller

  • Mots longs — placez bien l’accent: mechanical /məˈkænəkəl/, accelerator /əkˈsɛl.əˌɹeɪ.tɚ/

Les sons difficiles pour les francophones :

  • /h/ — il se souffle, il n’est pas muet: husky /ˈhʌs.ki/, halfback /ˈhæfˌbæk/
  • /tʃ/ et /dʒ/ — à ne pas adoucir en « ch » et « j »: chase /t͡ʃeɪs/, joule /d͡ʒuːl/
  • /r/ anglais — langue recourbée, sans frotter la gorge: gravity /ˈɡɹævɪti/, rat /ɹæt/, stairs /ˈstɛɹz/, everyday /ˈɛvɹiˌdeɪ/, trail /tɹeɪl/

Comment s’entraîner avec cette vidéo

  1. Écoutez la vidéo en entier une fois sans parler et notez les mots que vous ne connaissez pas.
  2. Répétez phrase par phrase à vitesse normale, en reprenant chacune jusqu’à ce que votre rythme corresponde à celui du locuteur.
  3. Enregistrez-vous et comparez avec l’original, en faisant attention à des mots comme watt, muscle, climb.

Qu'est-ce que la technique du Shadowing ?

Le Shadowing est une technique d'apprentissage des langues fondée sur la science, développée à l'origine pour la formation des interprètes professionnels. Le principe est simple mais puissant : vous écoutez de l'anglais natif et le répétez immédiatement à voix haute — comme une ombre suivant le locuteur avec un décalage de 1 à 2 secondes. Les recherches montrent une amélioration significative de la précision de la prononciation, de l'intonation, du rythme, des liaisons, de la compréhension orale et de la fluidité.

Technique du shadowing : lire le guide complet étape par étape →