Shadowing Practice: Power – Rate of Work - Learn English Speaking with Video
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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.
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Half the time, twice the power.
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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?
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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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Woordenschat en spreektips bij deze les
Deze spreekles is gebaseerd op de video “Power – Rate of Work”. Deze woorden komen het vaakst terug: energy, speed, quickly, husky, kinetic. Deze video bevat 43 zinnen en 431 woorden om na te spreken. Het gesproken deel duurt 3:26. De spreker praat in een gelijkmatig tempo van ongeveer 126 woorden per minuut, prettig om te shadowen. 83% van de woorden hoort bij de 3.000 meest gebruikte Engelse woorden; de rest kun je beter vooraf bekijken.
Belangrijke woorden in deze video
15 woorden uit de video die het leren waard zijn, met uitspraak en betekenis:
| Woord | Uitspraak | Betekenis |
|---|---|---|
| watt zelfstandig naamwoord | /wɑt/ | watt |
| muscle zelfstandig naamwoord | /ˈmʌs.əl/ | spier |
| climb werkwoord | /ˈklaɪ̯m/ | klimmen |
| rat zelfstandig naamwoord | /ɹæt/ | rat, bruine rat |
| stairs zelfstandig naamwoord | /ˈstɛɹz/ | trap |
| everyday bijvoeglijk naamwoord | /ˈɛvɹiˌdeɪ/ | alledaags |
| compare werkwoord | /kəmˈpɛɚ/ | vergelijken |
| trail zelfstandig naamwoord | /tɹeɪl/ | spoor |
| chase werkwoord | /t͡ʃeɪs/ | achtervolgen, achternazitten |
| roughly bijwoord | /ˈɹʌf.li/ | grofweg |
| mechanical bijvoeglijk naamwoord | /məˈkænəkəl/ | mechanisch |
| resist werkwoord | /ɹɪˈzɪst/ | weerstaan, zich verzetten |
| burst werkwoord | /bɜːst/ | barsten |
| divide werkwoord | /dɪˈvaɪd/ | verdelen |
| grip zelfstandig naamwoord | /ˈɡɹɪp/ | greep, grip |
Phrasal verbs die je zult horen
| Woord | Betekenis |
|---|---|
| get up werkwoord | opstaan |
| pick up werkwoord | oppakken, optillen |
Uitspraak om op te letten
- Lange woorden — let op de klemtoon: mechanical /məˈkænəkəl/, accelerator /əkˈsɛl.əˌɹeɪ.tɚ/
Klanken die Nederlandstaligen lastig vinden:
- Stemhebbende eindmedeklinker — /b/, /d/, /g/, /z/, /v/ niet verscherpen: stairs /ˈstɛɹz/, divide /dɪˈvaɪd/, upstairs /ˌʌpˈstɛɹz/, sled /ˈslɛd/, glide /ˈɡlaɪd/
- /æ/ — opener dan de Nederlandse “e”: gravity /ˈɡɹævɪti/, rat /ɹæt/, mechanical /məˈkænəkəl/, gather /ˈɡæðɚ/, halfback /ˈhæfˌbæk/
- /g/ — een harde plofklank, geen Nederlandse “g”: gravity /ˈɡɹævɪti/, gear /ɡɪɚ/, gather /ˈɡæðɚ/, grip /ˈɡɹɪp/, glide /ˈɡlaɪd/
Zo oefen je met deze video
- Luister de hele video één keer zonder te spreken en noteer de woorden die je niet kent.
- Spreek zin voor zin na op normale snelheid en herhaal elke zin tot je ritme gelijk is aan dat van de spreker.
- Neem jezelf op en vergelijk met het origineel; let daarbij op woorden als watt, muscle, climb.
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Shadowing is een wetenschappelijk onderbouwde taalleermethode die oorspronkelijk is ontwikkeld voor professionele tolkentraining en gepopulariseerd door polyglot Dr. Alexander Arguelles. De methode is eenvoudig maar krachtig: je luistert naar native Engelse audio en herhaalt het onmiddellijk hardop — als een schaduw die de spreker volgt met slechts 1–2 seconden vertraging. In tegenstelling tot passief luisteren of grammaticadrills, dwingt shadowing je hersenen en mondspieren om echte spraakpatronen tegelijkertijd te verwerken en te reproduceren. Onderzoek toont aan dat het de uitspraaknauwkeurigheid, intonatie, ritme, verbonden spraak, luisterbegrip en spreekvaardigheid aanzienlijk verbetert — waardoor het een van de meest effectieve methoden is voor IELTS Speaking-voorbereiding en echte Engelse communicatie.