Практика Shadowing: Types of Levers - Изучайте разговорный английский по видео

A lever is a simple machine that includes a bar that is free to move about a fixed point called a fulcrum.

Levers make work easier by reducing the effort required to move the load, but increasing the distance moved by the effort.

This can be achieved by moving the fulcrum closer to the load or applying the effort further from the fulcrum.

There are three types of levers.

First class levers, second class levers and third class levers.

Each type of lever makes work easier in different ways.

In a first class lever, the fulcrum is between the load and the place on the bar where the effort is applied.

This changes the direction of the effort.

Work is the easiest when the effort is applied to the bar as far from the fulcrum as possible.

The distance the effort moves is increased, but the force applied to the load is multiplied.

Moving the fulcrum closer to the load increases the distance the effort moves and increases the force applied to the load.

You use first class levers when you use pliers to pull a nail.

The piece of wood is the fulcrum.

The fulcrum is close to the load which increases the distance the effort moves and multiplies the force applied to the nail.

The back of a claw hammer, nail clippers and scissors are objects we use that function as first class levers.

In second class levers, the load is between the effort and the fulcrum.

The effort moves over a larger distance to raise the load a smaller distance, but with greater force.

The closer the load is to the fulcrum, the larger the distance the effort moves and the greater the force applied to the load.

Notice that in second-class levers, the effort applied is in the same direction as the force applied to the load.

Wheelbarrows, nutcrackers and bottle openers are objects we use that function as second-class levers.

In both first-class and second-class levers,

work is made easier by decreasing the effort required but applying the effort over a greater distance.

In a third class lever, the effort is between the fulcrum and the load.

Greater effort is required to move the load, but the speed at which the load moves is multiplied.

As in second class levers, the direction of the effort and the force applied to the load is in the same direction.

Fishing rods, baseball bats, and brooms are objects that function as third-class levers.

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Что такое техника Shadowing?

Shadowing — это научно обоснованная техника изучения языка, изначально разработанная для подготовки профессиональных переводчиков и популяризированная полиглотом доктором Александром Аргуэльесом. Метод прост, но эффективен: вы слушаете аудио на английском от носителей языка и немедленно повторяете вслух — как тень, следующая за говорящим с задержкой в 1–2 секунды. В отличие от пассивного прослушивания или грамматических упражнений, Shadowing заставляет мозг и мышцы рта одновременно обрабатывать и воспроизводить реальные речевые паттерны. Исследования показывают, что это значительно улучшает точность произношения, интонацию, ритм, связную речь, понимание на слух и беглость речи — что делает его одним из самых эффективных методов для подготовки к IELTS Speaking и реального общения на английском.

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Практика Shadowing: Types of Levers - Изучайте разговорный английский по видео

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