ب- جسم كتلته 4 كجم موضوع على مستوى خشن يميل على الافقى بزاوية
قياسها 30 ° ويتصل بخيط يمر على بكرة ملساء عند قمة المستوى ويتدلى
من الطرف الاخر للخيط جسم كتلته \left(ك\right) كجم فاذا تحركت الكتلة 4
كجم من السكون على المستوى الى اعلى مسافة 490 سم فى 2 ثانية فاجد
مقدار \left(ك\right) علما بان معامل الاحتكاك الحركى بين الجسم والمستوى \frac{\sqrt{3}}{2}
واوجد ايضا مقدار الضغط على محور البكرة
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................