Paper 4 May/June 2011 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.

A particle of mass $0.8{\text{ }}kg$ slides down a rough inclined plane along a line of greatest slope $AB$. The distance $AB$ is $8{\text{ }}m$. The particle starts at $A$ with speed $3{\text{ }}m{\text{ }}{s^{ - 1}}$ and moves with constant acceleration $2.5{\text{ }}m{\text{ }}{s^{ - 2}}$.
a) Find the speed of the particle at the instant it reaches $B$.
b) Given that the work done against the frictional force as the particle moves from $A$ to $B$…