Paper 5 October/November 2011 MATHEMATICS (9709/51) A Levels
لطفا برای اطمینان از عملکرد و تجربه بهتر از مرورگرهای مدرن و به روز مانند کروم یا فایرفاکس استفاده کنید.

A particle $P$ is projected from the top of a smooth ramp with speed $um{\text{ }}{s^{ - 1}}$, and travels down a line of greatest slope. The ramp has length $6.4{\text{ }}m$ and is inclined at and is inclined at ${30^ \circ }$ to the horizontal. Another particle $Q$ is released from rest at a point $3.2{\text{ }}m$ vertically above the bottom of the ramp, at the same instant that $P$ is projected (see diagram). Given that $P$ and $Q$ reach the bottom of the ramp simultaneously, find
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