There are four arrangements of a solid cylinder and a plank as shown in the figures. Some surfaces

There are four arrangements of a solid cylinder and a plank as shown in the figures. Some surfaces are smooth and some are rough as indicated . There is no slipping at each rough surface. The plank and `//` or centre of cylinder are given a horizontal constant velocity as shown in each of the situations. Usinn this information fill in the blanks. The speed of center of mass of the cylinder is `.........................`. `(ii)` , The angular velocity of the cylinder is `.......................`. `(iii)`,`