اريد المساعده؟

[jee]

بسم الله الرحمن الرحيم

ياليت تساعدوني بهذاا السؤال مهم جدا

[jee]

هذا سؤال بالنهائي معنا ورفض يحله لنا

ياليييييتت تساعدوني

[harrab]

لم افهم السؤال جيدا . هل هناك علاقة معينة يجب ان نصل اليها من تعويض المتغيرات في المعادلة الاصلية ؟؟

[jee]

نعم يوجد علاقه نصل اليها

[محمد.المصري]

بسم الله الرحمن الرحيم

ياليت تساعدوني بهذاا السؤال مهم جدا

من الواضح انه مطلوب تحويل السرعة بالأحداثيات القطبيه

من المعطيات فإن المفهوم هو أن

http://latex.codecogs.com/gif.latex?r%5E%7B%5Ccirc%7D%3D%5Cfrac%7Bdr%7D%7Bdt %7D

http://latex.codecogs.com/gif.latex?%5CTheta%5E%7B%5Ccirc%7D%3D%5Cfrac%7Bd%5 CTheta%20%7D%7Bdt%20%7D

و بالتعويض من المعطيات نجد أن

http://latex.codecogs.com/gif.latex?%5Cfrac%7Bdr%7D%7Bdt%7D%3D-h%5Cfrac%7Bdu%7D%7Bd%5CTheta%20%7D

و منها

http://latex.codecogs.com/gif.latex?dr%3D-h%5Cfrac%7Bdt%7D%7Bd%5CTheta%7Ddu

بالتعويض من المعطيات ينتج أن

http://latex.codecogs.com/gif.latex?dr%3D-h%5Cfrac%7B1%7D%7Bhu%5E2%7Ddu

أي ان

http://latex.codecogs.com/gif.latex?dr%3D-%5Cfrac%7B1%7D%7Bu%5E2%7Ddu

و بأجراء التكامل على الطرفين ينتج ان

http://latex.codecogs.com/gif.latex?r%3D%5Cfrac%7B1%7D%7Bu%7D

و أخيرا عوض عن المقادير http://latex.codecogs.com/gif.latex?r%2Cr%5E%7B%5Ccirc%7D%2C%5CTheta%20%5E%7 B%5Ccirc%7D سوف ينتج المطلوب

و اذا طلب العلاقة باستخدام http://latex.codecogs.com/gif.latex?u%5E%7B%5Ccirc%7D

عوض عن r0 بالصورة

بما ان
http://latex.codecogs.com/gif.latex?r%5E%7B%5Ccirc%7D%3D%5Cfrac%7Bdr%7D%7Bdt %7D%3D-h%5Cfrac%7Bdu%7D%7Bd%5CTheta%20%7D

اي

http://latex.codecogs.com/gif.latex?%5Cfrac%7Bdr%7D%7Bdt%7D%3D-h%5Cfrac%7Bdu%7D%7Bdt%20%7D%5Cfrac%7Bdt%7D%7Bd%5CT heta%20%7D

اي ان

http://latex.codecogs.com/gif.latex?%5Cfrac%7Bdr%7D%7Bdt%7D%3D-h%5Cfrac%7Bdu%7D%7Bdt%20%7D%5Cfrac%7B1%7D%7Bhu%5E2 %20%7D

اي نعوض عن r0 بالصورة

http://latex.codecogs.com/gif.latex?r%5E%7B%5Ccirc%7D%3D-%5Cfrac%7B1%7D%7Bu%5E2%20%7Du%5E%7B%5Ccirc%7D

اي يمكن الحصول على الصورة العامة

http://latex.codecogs.com/gif.latex?%5Cfrac%7B1%7D%7B2%7DM%28%5Cfrac%7B1%7D% 7Bu%5E4%20%7Du%5E%7B%5Ccirc%7D%5E%7B2%7D+h%5E2u%5E 2%29+%5Cphi%28%5Cfrac%7B1%7D%7Bu%7D%29%20%3D%20E


لقد شرحت بإيجاز


و بالتوفيق ان شاء الله

[myy]

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