What is energy?
Look around you. Is anything moving?
Can you hear, see or feel anything? Sure... this is because something is making something happen, and most probably, there is some power at work. This power or ability to make things happen is what we can call energy. It makes things happen. It makes change possible.
Look at the sketch below to see an example of things working, moving, or happening... with energy.
now we can ask
Here are the different basic forms:
Resources
Look around you. Is anything moving?
Can you hear, see or feel anything? Sure... this is because something is making something happen, and most probably, there is some power at work. This power or ability to make things happen is what we can call energy. It makes things happen. It makes change possible.
يمكنك لشرح هذا الدرس أن تطلب من طلابك أو أطفالك النظر حولهم وتحليل كل ما يرون ويشعرون ويسمعون وما سبب ما يحدث فى كل ذلك عندها يمكن التوصل الى أن هناك شىء أو سبب دائما وراء تحرك أو أنارة أو صوت معين وهذا الشىء يمكن وصفه بقدرته على العمل أو التشغبل ( أنارة - صوت - تشغيل ) أحداث تغيير فى حاله معينه هو طاقة فى حد ذاتها.
now we can ask
What are the different forms of energy?
Energy has a number of different forms, all of which measure the ability of an object or system to do work on another object or system.
لذلك هناك اشكال للطاقة كلها مختلفة ولديها القدرة على جعل الشىء يعمل عن طريق شئ اخر
In other words, there are different ways that an object or a system can possess energy.
KINDS OF ENERGY
With the above explanation in mind, let us learn more.
Let's start by looking at kinetic energy.
All moving things have kinetic energy. It is energy possessed by an object due to its motion or movement. These include very large things, like planets, and very small ones, like atoms. The heavier a thing is, and the faster it moves, the more kinetic energy it has.
There is a small and large ball resting on a table
Kinetic Energy in use.
With the above explanation in mind, let us learn more.
أستكمالنا لما يفكر فيه التلاميذ وراء عمل الاشياء حولهم ومن خلال الامثله التايه يمكن أستنتاج أن الطاقة يمكن أن تخزن ويتم الاحتفاظ بها ويتم نقلها من مكان لاخر أو من شئ لاخر
Energy can be (is) stored or transferred from place to place, or object to object in different ways. There are various kinds of energy. Let's start by looking at kinetic energy.
Kinetic Energy
All moving things have kinetic energy. It is energy possessed by an object due to its motion or movement. These include very large things, like planets, and very small ones, like atoms. The heavier a thing is, and the faster it moves, the more kinetic energy it has.
كل ما لديه القدرة على الحركه لديه طاقة حركية هذه الطاقة تخزن بالشئ نتيجة حركته والامثله كثير طائرات كمثال كبير و أصغر مثال كالذرة وتتناسب حركة الشئ طرديا مع حركته
Now let's see this illustration below.There is a small and large ball resting on a table
Kinetic Energy in use.
A hydro-electric power dam uses the concept of kinetic energy in fast flowing water to produce electricity.
يستخدم فكرة السد الطاقة الكهرمائية مفهوم الطاقة الحركية وسرعة تدفق المياه لإنتاج الكهرباء.
Take a look at how a basic hydro-electric power dam is set up in the diagram below.
1. Water from a stream or river is held up (blocked) by the sluice gate. Holding up more water increases
potential energy and gravitational energy.
يعتبر انحسار وزيادة الماء فى مجرى النهر امام بوابة السد طاقة وضع ويأثر عليها طاقة الجاذبية الارضية لتزيد من طاقة الوضع
2. The gates are then opened. Water rushes down through the gate and into the tubes. There is immense
kinetic energy in the very fast flowing water because of the high pressure it has.
kinetic energy in the very fast flowing water because of the high pressure it has.
عند فتح بوابة السد يندفع الماء لاسفل لتتحول طاقة الوضع لطاقة حركة نتيجة لتسارع الماء
3. Kinetic energy in the fast flowing water turns shafts (blades) connected to the end of the tubes.
More fast flowing water means more blades can be turned even faster.
More fast flowing water means more blades can be turned even faster.
مع وجود ريشات تعمل كتربيد متصله بمولدات فى اسفل النهر تلاقى اندفاع المياة يمكن عندها انتاج طاقة من الطاقة الحركيه لطاقة كهربائية
4. The spinning blades or shafts are connected to a generator which generates the electricity.
The generator is connected to a transformer which supplies our homes with electricity
Potential Energy:
Consider a book sitting on a table the Earth's gravity is necessary to create this kinetic energy, and because this gravity depends on the Earth being present, we say that the "Earth-book system" is what really possesses this potential energy, and that this energy is converted into kinetic energy as the book falls.
وضع الكتاب على الطاوله هى طاقة وضع حيث ان الجاذبية الارضية هى سبب تحول طاقة الوضع هنا الى طاقة حركة .
heat energy:
Consider a hot cup of coffee.Temperature is really a measure of how much thermal energy something has. The higher the temperature, the faster the molecules are moving around and/or vibrating, i.e. the more kinetic and potential energy the molecules have.
كوب القهوة الدافئ احد أشكال الطاقة الحرارية حيث أن الحرارة تقاس بمدى الحرارة التى تنتج من الشئ وكلما زادت الحرارة تسارعت جزيئات فى الحركة
Chemical Energy:
Consider the ability of your body to do work. The glucose (blood sugar) in your body Your muscles use this energy to generate mechanical force and also heat. Chemical energy is really a form of microscopic potential energy, which exists because of the electric and magnetic forces of attraction exerted between the different parts of each molecule - the same attractive forces involved in thermal vibrations. These parts get rearranged in chemical reactions, releasing or adding to this potential energy.
بأعتبار الطاقة القدرة على القيام بالعمل يمكن أتخاذ الجلوكوز الموجود بالدم مثال للطاقة الكيميائية حيث تستهلك عضلات الجسم الجلوكوز لإنتاج طاقة ميكانيكية و حرارة هذه الطاقة تنتج بسبب قوى الكهرباء و المغناطيسيه الموجودة بين الجزيئات
Sound Energy:
example the head of drum, it compresses the air nearby, giving that air potential energy. That air then expands, transforming the potential energy into kinetic energy (moving air).
اله الطبل يعتبر سطحها مثالا للطاقة الصوتية حيث ينظغط الهواء بالقرب منها لاينتج طاقة وضع بعدها الهواء يتمدد ويتحولالى طاقة حركية عن طريق تحرك الهواء
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