Physics - NLM Question with Solution | TestHub

A small ring $R$ of mass 0.2 kg is threaded onto a fixed rod which is inclined at an angle of $30^{\circ }$ to the horizontal. The ring is attached to a block B of mass 0.5 kg by means of a light string which passes over a smooth pulley P . The part RP of the string is perpendicular to the rod, and the part PB of the string is vertical (see diagram). The system is in equilibrium. Assuming the equilibrium is limiting, the coefficient of friction ( $\mu$ ) between R and the rod is x then find the value of 10x ? (take $\sqrt{3}=1.7$ )