Paper 4 May/June 2006 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.

A narrow groove is cut along a diameter in the surface of a horizontal disc with centre $O$. Particles $P$ and $Q$, of masses $0.2{\text{ }}kg$ and $0.3{\text{ }}kg$ respectively, lie in the groove, and the coefficient of friction between each of the particles and the groove is $\mu $. The particles are attached to opposite ends of a light inextensible string of length $1{\text{ }}m$. The disc rotates with angular velocity $\omega {\text{ }}rad{\text{ }}{s^{ - 1}}$ about a vertical…