Physics - Rotation Question with Solution | TestHub

A smooth rod$OP$is fixed vertically. A disc of mass$m$and radius$R$is rolling without slipping at the given instant on a rough horizontal surface as shown. Velocity of centre of mass$C$of disc is$v_0$. A rod$AB$of length$L$is connected with disc at$A$,$R/2$distance vertically up from centre of disc with pin joint (about which it can rotate freely), other end of the rod is attached to a small smooth ring$B$, which can move freely over rod$OP$. At an instant rod$AB$makes an angle$60°$with the vertical. The velocity of ring on the vertical rod at this instant is.