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منذ 6 سنوات
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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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