Paper 4 May/June 2003 MATHEMATICH (9709/4) A Levels
لطفا برای اطمینان از عملکرد و تجربه بهتر از مرورگرهای مدرن و به روز مانند کروم یا فایرفاکس استفاده کنید.

$ABC$ is a vertical cross-section of a surface. The part of the surface containing $AB$ is smooth and $A$ is $4{\text{ }}m$ higher than $B$. The part of the surface containing $BC$ is horizontal and the distance $BC$ is $5{\text{ }}m$ (see diagram). A particle of mass $0.8{\text{ }}kg$ is released from rest at $A$ and slides along $ABC$. Find the speed of the particle at $C$ in each of the following cases.
a) The horizontal part of the surface is smooth.
b)…