Paper 4 May/June 2011 MATHEMATICS (9709/42) A Levels
لطفا برای اطمینان از عملکرد و تجربه بهتر از مرورگرهای مدرن و به روز مانند کروم یا فایرفاکس استفاده کنید.

$AB$ and $BC$ are straight roads inclined at ${5^ \circ }$ to the horizontal and ${1^ \circ }$ to the horizontal respectively. $A$ and $C$ are at the same horizontal level and $B$ is $45{\text{ }}m$ above the level of $A$ and $C$ (see diagram, which is not to scale). A car of mass $1200{\text{ }}kg$ travels from $A$ to $C$ passing through $B$.
a) For the motion from $A$ to $B$, the speed of the car is constant and the work done against the resistance to motion is $360{\text{…