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جسم كتلته ك = \left(2ن\ +\ 5\right)  كجم  ومتجه  موضعه    \overline{ر}\ =\ \left(\frac{1}{2}\ ن2\ +\ ن\ -\ 5\ \right)\ \overline{ى}   حيث  \ \overline{ى}  متجه وحدة ثابت , الازاحة  مقاسة بالمتر  , ن بالثانية اوجد : 

ا- متجهى  السرعة والعجلة عند اى لحظة زمنية ن .

ب- مقدار القوة المؤثرة على الجسم عند ن = 10 ث .

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