Knowledge is power ,

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منذ 7 سنوات
اجابة  0   مشاهدة  14

جسم كتلته 60 جم موضو على نصد افقى خشن ثم وصل بخيط خفيف يمر بكرة

صغيرة ملساء عند حافة النضد وحمل فى طرفة جسما  كتلته 38 جم يتدلى  راسيا فاذا تحركت المجموعة

من السكون وقطعت مسافة 70 سم  فى ثانية واحدة . احسب معامل الاحتكاك

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