Shadowing Practice: Types of Levers - Learn English Speaking with Video

Les maken...
1
A lever is a simple machine that includes a bar that is free to move about a fixed point called a fulcrum.
2
Levers make work easier by reducing the effort required to move the load, but increasing the distance moved by the effort.
3
This can be achieved by moving the fulcrum closer to the load or applying the effort further from the fulcrum.
4
There are three types of levers.
5
First class levers, second class levers and third class levers.
6
Each type of lever makes work easier in different ways.
7
In a first class lever, the fulcrum is between the load and the place on the bar where the effort is applied.
8
This changes the direction of the effort.
9
Work is the easiest when the effort is applied to the bar as far from the fulcrum as possible.
10
The distance the effort moves is increased, but the force applied to the load is multiplied.
11
Moving the fulcrum closer to the load increases the distance the effort moves and increases the force applied to the load.
12
You use first class levers when you use pliers to pull a nail.
13
The piece of wood is the fulcrum.
14
The fulcrum is close to the load which increases the distance the effort moves and multiplies the force applied to the nail.
15
The back of a claw hammer, nail clippers and scissors are objects we use that function as first class levers.
16
In second class levers, the load is between the effort and the fulcrum.
17
The effort moves over a larger distance to raise the load a smaller distance, but with greater force.
18
The closer the load is to the fulcrum, the larger the distance the effort moves and the greater the force applied to the load.
19
Notice that in second-class levers, the effort applied is in the same direction as the force applied to the load.
20
Wheelbarrows, nutcrackers and bottle openers are objects we use that function as second-class levers.
21
In both first-class and second-class levers,
22
work is made easier by decreasing the effort required but applying the effort over a greater distance.
23
In a third class lever, the effort is between the fulcrum and the load.
24
Greater effort is required to move the load, but the speed at which the load moves is multiplied.
25
As in second class levers, the direction of the effort and the force applied to the load is in the same direction.
26
Fishing rods, baseball bats, and brooms are objects that function as third-class levers.
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Woordenschat en spreektips bij deze les

Deze video bevat 26 zinnen en 420 woorden om na te spreken. Het gesproken deel duurt 2:59. De spreker praat in een gelijkmatig tempo van ongeveer 141 woorden per minuut, prettig om te shadowen. 84% van de woorden hoort bij de 3.000 meest gebruikte Engelse woorden; de rest kun je beter vooraf bekijken.

Belangrijke woorden in deze video

14 minder gangbare woorden uit de video, met uitspraak en betekenis:

  • lever /ˈliː.və/ (zelfstandig naamwoord) — hefboom. A rigid piece which is capable of turning about one point, or axis (fulcrum), and in which are two or more other points where forces are applied; — used for…
  • nail /neɪl/ (zelfstandig naamwoord) — nagel. The horny plate or appendage at the ends of the digits of various animals, including most reptiles, birds, and mammals (both nonhuman and human).
  • decrease /dɪˈkɹiːs/ (werkwoord) — afnemen, verminderen. Of a quantity, to become smaller.
  • hammer /ˈhæmɚ/ (zelfstandig naamwoord) — hamer. A tool with a heavy head and a handle used for pounding.
  • opener /ˈoʊ.pən.ɚ/ (zelfstandig naamwoord) — opener. A person who opens something.
  • claw /klɔ/ (zelfstandig naamwoord) — klauw. A curved, pointed, horny projection on each digit of the foot of a mammal, reptile, or bird.
  • scissors /ˈsɪzəz/ (zelfstandig naamwoord) — schaar. A tool used for cutting thin material, consisting of two crossing blades attached at a pivot point in such a way that the blades slide across each other when…
  • fulcrum /ˈfʊlkɹəm/ (zelfstandig naamwoord) — draaipunt, steunpunt. The support about which a lever pivots.
  • multiply /ˈmʌltɪplaɪ/ (werkwoord) — vermenigvuldigen. To increase the amount, degree or number of (something).
  • broom /bɹum/ (zelfstandig naamwoord) — bezem. A domestic utensil with fibers bound together at the end of a long handle, used for sweeping.
  • clipper /ˈklɪp.ɚ/ (zelfstandig naamwoord) — klipper. Anything or anyone that clips.
  • nutcracker /ˈnʌtˌkɹækɚ/ (zelfstandig naamwoord) — notenkraker. An implement for cracking nuts.
  • pliers /ˈplaɪ.ə(ɹ)z/ (zelfstandig naamwoord) — tang. A pincer-like gripping tool that multiplies the strength of the user's hand, often used for bending things.
  • wheelbarrow /ˈwilbæɹoʊ/ (zelfstandig naamwoord) — kruiwagen. A small, one-wheeled (or rarely, two-wheeled) cart with handles at one end for transporting small loads.

Zo oefen je met deze video

  1. Luister de hele video één keer zonder te spreken en noteer de woorden die je niet kent.
  2. Spreek zin voor zin na op normale snelheid en herhaal elke zin tot je ritme gelijk is aan dat van de spreker.
  3. Neem jezelf op en vergelijk met het origineel; let daarbij op woorden als lever, nail, decrease.

Wat is de Shadowing-techniek?

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.

Shadowing-techniek: lees de volledige stap-voor-stap-gids →