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2-dimensional momentum problem (part 2) http://www.khanacademy.org/video/2-dimensional-momentum-problem--part-2 ----------------------------------------------- يتناول هذا الفيديو حل مسألة لايجاد الزخم في بعدين ----------------------------------------------- شكر خاص لمؤسسة شركاء في التنمية المستدامة -- فلسطين http://psdpal.org