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Question 1 of 5
1. Question
1- تصنع الطائرات بشكل …………..
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Question 2 of 5
2. Question
2- تؤثر قوة الاحتكاك في اتجاه ……………..لاتجاه الحركة
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Question 3 of 5
3. Question
3- مقاومة الماء نوع من الاحتكاك ينشأ عن حركة الجسم في الهواء ( )
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Question 4 of 5
4. Question
4- يساعد الاحتكاك في عدم انتظام السيارة علي الطريق ( )
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Question 5 of 5
5. Question
5- من اضرار الاحتكاك تلف الآلات الميكانيكية و تآكلها ( )
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