اثرت قوة ثابتة \overline{ق} على جسيم بحيث كان متجه ازاحته يعطى كدالة فى الزمن ن بالعلاقة
\overline{ف} = (3 ن2 + ن ) \overline{س} - 4ن \overline{ص} حيث \overline{س}\ ,\ \overline{ص} متجها وحدة متعامدين اوجد \overline{ق} تساوى 165
ارج / ث عندما ن = 9 ثانية علما بان ف مقيسة بالسنتمتر , \overline{ق} مقيسة بالداين
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