[علاء الادريسي]

أصدقاء المنتدى مرحبا بكم
هذه مجموعة من المقالات الشيقة حول الفيزياء و شكرا
http://clicsciences.blogspot.com/p/blog-page_49.html

[ahmedkh1977]

كيفية حساب تسريع الناتج من حركة عجلتين احداهما اكبر من الاخرى؟

[myy]

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