Paper 4 May/June 2010 MATHEMATICS (9709/41) A Levels
لطفا برای اطمینان از عملکرد و تجربه بهتر از مرورگرهای مدرن و به روز مانند کروم یا فایرفاکس استفاده کنید.

An object of mass $8{\text{ }}kg$ slides down a line of greatest slope of an inclined plane. Its initial speed at the top of the plane is $3{\text{ }}m{\text{ }}{s^{ - 1}}$ and its speed at the bottom of the plane is $8{\text{ }}m{\text{ }}{s^{ - 1}}$. The work done against the resistance to motion of the object is $120{\text{ }}J$. Find the height of the top of the plane above the level of the bottom.