بالعلم ترتقى الامم

الديناميكا

بوسى
منذ 7 سنوات
اجابة  0   مشاهدة  5

اثرت قوة ثابتة   \overline{ق}  على جسيم بحيث كان متجه ازاحته يعطى كدالة فى الزمن  ن بالعلاقة 

\overline{ف}  = (3 ن2 + ن ) \overline{س} - 4ن  \overline{ص}  حيث \overline{س}\ ,\ \overline{ص}  متجها وحدة متعامدين  اوجد \overline{ق}  تساوى 165 

ارج / ث عندما  ن = 9 ثانية  علما بان ف مقيسة بالسنتمتر  , \overline{ق} مقيسة بالداين 

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بوسى
منذ 7 سنوات
اجابة  0   مشاهدة  9

اذا اثرت قوة متغيرة ق ( مقاسة بالنيوتن ) على جسيم حيث ق تعطى بالعلاقة ق = 4 ف3 فان 

الشغل المبذول من هذه القوة فى الفترة من ف = 0 الى ف = 2 متر يساوى ................................

ا- 16 ارج

ب- 16 جول 

ج- 32 ارج

د- 32 جول 

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بوسى
منذ 7 سنوات
اجابة  0   مشاهدة  6

جسيم يتحرك فى خط مستقيم  بحيث كانت عجلته  جـ تعطى كدالة فى الزمن  بالعلاقة جـ = 2 ن - 6

حيث جـ مقاسة م / ث2 , الزمن ن بالثانية  فان كان التغير فى كمية حركة الجسيم خلال الفترة 

3\leن\le5\     يساوى 32 كجم م/ث فاحسب كتلة الجسم 

 

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بوسى
منذ 7 سنوات
اجابة  0   مشاهدة  6

اذا كان ع = 3 ن2 - 2 ن  فان من خلال الفترة [ 0 , 2 ] تساوى ............... وحدة طول 

ا- 1

ب- 2

ج- 4

د- 10

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بوسى
منذ 7 سنوات
اجابة  0   مشاهدة  5

جسيم يتحرك فى خط مستقيم بحيث كانت ف = 3 هـن+2 فان سرعته الابتدائية تساوى ..............................

ا- 3

ب- هــ

ج- هـ2

د- 6هـ2

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بوسى
منذ 7 سنوات
اجابة  0   مشاهدة  5

يلاقى كتلته 300 جم موضوع على ارتفاع  10 امتار من سطح الارض

اوجد طاقة وضع الجسم واذا سقط الجسم راسيا فاوجد طاقة حركته عندما

يكون على ارتفاع 3 امتار من سطح الارض 

 

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بوسى
منذ 7 سنوات
اجابة  0   مشاهدة  5

مستوى مائل خشن  طوله 20 مترا ورتفاعه 5 امتار اوجد اصغر سرعة يقذف

بها جسم من اسفل نقطة فى المستوى المائل وفى اتجاه خط اكبر ميل 

للمستوى لكى يصل بالكاد الى اعلى نقطة فى المستوى علما بان الجسم

يلاقى مقومات  تساوى   \frac{1}{4}  وزنه 

 

 

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بوسى
منذ 7 سنوات
اجابة  0   مشاهدة  5

قطر قدرة الته 504 حصان وكتلته 216 طنا يتحرك على طريق افقى باقصى 

سرعة له ضد مقاومات تعادل 5 ث كجم لكل طن من الكتلة اوجد اقصى سرعة 

له بالكم / س 

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بوسى
منذ 7 سنوات
اجابة  0   مشاهدة  6

عربة ترام ساكنة شدت بحبل يصنع مع شريط الترام زاوية قياسها 60°

فاذا كانت قوة الشد 500 ث . كجم وتحركت العربة بعجلة 5 سم / ث2 لمدة 30 ث

احسب الشغل الذى بذلته قوة الشد بالجول

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بوسى
منذ 7 سنوات
اجابة  0   مشاهدة  5

اذا كانت قدرة الة عند اى زمن ن مقاسا بالثانية تساوى 9ن2+ 4 ن وحدة

قدرة  فان  الشغل المبذور من الالةخلال الثانية الرابعة يساوى  ..... وحدة شغل . 

ا - 125 

ب - 67 

ج - 224 

د - 99