اب ج مثلث قائم الزاوية فى ب ا ب =3 سم ب ج =4 سم اثرت قوى مقاديرها 12و ق و 20 نيوتن فى اتجاه الشعاع اب والشعاع ب ج والشعاع ج ا على الترتيب اثبت ان خط عمل المحصلة يوازى ب ج واذا قطع خط عمل المحصلة الشعاع ب ا فى نقطة م حيث م لاتنتمى للقطعة المستقيمة ا ب
,ا م = 5 سم
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اثرت مجموعة من القوى المستوية فى مستوى معين اب جء الذى فيه اب= ب د = 6 سم فوجد ان المجموع الجبرى لعزوم القوى حول أ,ب ,ج يساوى 36 , سالب 36 , 36 على الترتيب عين محصلة هذه القوى
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اثرت مجموعة من القوى المستوية فى مستوى المثلث ا ب ج حيث أ= (0,0), ب= (1,4 ),ج= (5,2)فوجد ان متجه العزم عند أ= صفر ومتجه العزم عند ب= سالب 18 فى اتجاه متجه الوحدة ع ومتجه العزم عند ج =18 فى اتجاه متجه الوحدة ع عين محصلة هذه القوى
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