Презентация урока "The force of gravity"
презентация к уроку по английскому языку на тему

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Интегрированный урок «английск ий язык+ физика» Тема урока: Сила всемирного тяготения The Theme :The force of gravity

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Разработала учитель английского языка Закирова М.З.

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The Theme :The force of gravity Objectives of the lesson : - To introduce the new term «the force of gravity» - To determine a connection between the force of gravity, mass and distance between the pulling objects. - Practise to use new knowledge and skills.

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Тема урока: Сила всемирного тяготения Цели урока : - Ознакомить учащихся с понятием силы тяготения. - Установить взаимосвязь между силой притяжения тел, их массами и расстоянием между ними. - Провести актуализацию полученных знаний

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Planets

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Let’s look at words connected with the theme of our lesson Gravity – гравитация Gravitational – гравитационный The Solar System – солнечная система Pluto – Плутон Jupiter – Юпитер Mercury – Меркурий

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The English physicist and mathematician Isaac Newton was one of the greatest scientists of all times

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His theories revolutionized scientific thinking and laid the foundation of modern physics. His book “Principia of Mathematic” is one of the most important words of modern science. Newton discovered the law of gravity and developed the three laws of motion that are still in use today. He was the first person to split the white color of the spectrum and his research of the light led him to design a reflecting telescope.

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Английский ученый Исаак Ньютон обобщил законы движения тел во Вселенной и доказал, что между всеми телами действуют силы взаимного притяжения. Он назвал их силами взаимного тяготения .

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Now let’s try to use information that you have got in following questions 1.Why don’t we see how objects in the room pull each other despite the force of gravity?

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2. How will planets move if the Sun’s gravity disappears? The planets will not move in orbits and leave the Solar System

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3. Does a man pull the ground on which he stands ? A flying plane? A cosmonaut in the space station? Y es, the force of gravity acts between any objects

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4 . What should we do if we want to increase the force of gravity between objects? We should decrease the distance between them

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5. What force causes high and low tides in seas and oceans? The Moon’s gravity that pulls the Earth

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6. Every planet has an orbit . Why do planets move in orbits and don’t fall towards the Sun? It’s because of the force of gravity. Because of the Sun’s gravity each planet would fall straight towards the Sun if it was not moving sideways at high speed. The Earth travels at 30 km/sec. This is exactly the right speed to keep it moving in a circle called an orbit

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TEST

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Решите задачу Найдите силу гравитационного притяжения между двумя телами массами 60 кг и 50 кг, если они находятся на расстоянии 1 м. Дано: Решение m 1 = 60 кг F=Gm 1 m 2 /r 2 m 2 = 50 кг r = 1 м G = 6, 67·10 -11 ___________ Fгр - ? Fгр = 20,01·10 -9 = 2·10 -7 Н Таким образом, сила гравитационного притяжения оказалась ничтожно малой из-за малых масс тел.

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Say if the f о lowing statements true or false The bigger the mass of an object the bigger the force of gravity. Gravity is the force of attraction between objects. The Sun has a very large mass, so it exerts a large pull of gravity on everything in the solar system. The force of gravity acts only on the Earth . The force of gravity is measured in kilograms.

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English teacher : Our lesson is over. That you very much for our attention and work.