ماذا نعني بأن الطاقة كمية محفوظة؟!

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Presentation transcript:

ماذا نعني بأن الطاقة كمية محفوظة؟! مجلس أبوظبي للتعليم منطقة العين التعليمية قطار التعرج مدرسة المعالي النموذجية The Roller Coaster -1 الطاقة و أهميتها: Energy الرفاهية والحياة الكريمة تعتمد كثيراً على مدى توافر مصادر متنوعة للطاقة في الدولة. الأبحاث تنصق حول مصادر جديدة للطاقة. الخطط الاستراتيجية تبنى على حجم الطاقة المتوفرة في بقعة معينة. أهمية الطاقة أنواع الطاقة الطاقة تعبر عن ”المقدرة على انجاز شغل ما“. الطاقة كمية محفوظة. الطاقة الميكانيكية هي أهم صور الطاقة . ماذا نعني بأن الطاقة كمية محفوظة؟! 1 -2 طاقة الحركة وطاقة الوضع : Kinetic Energy & Potential Energy Remember: طاقة الوضع: (طاقة غير منظورة أي طاقة كامنة)

الطاقة الميكانيكية = طاقة الحركة + طاقة الوضع -3 قانون حفظ الطاقة الميكانيكية : Conservation of Mechanical Energy الطاقة الميكانيكية = طاقة الحركة + طاقة الوضع 2

طاقة الحركة طاقة الوضع النقطة أ ………… ب …………….. ج في الشكل أدناه إذا بدأت العربة الحركة من النقطة (أ) وعلمت أن الطاقة الميكانيكية لها وكتلتها ، أجيبي عما يلي: -1 أكملي الجدول التالي: طاقة الحركة طاقة الوضع النقطة أ ………… ب …………….. ج 3 -2 احسبي بعد النقطة (أ) عن سطح الارض؟ أعتبري عجلة الجاذبية الارضية تساوي