$21-54.$ The $10-kg$ disk turns around the shaft $AB,$ while the shaft rotates about $BC$ at a constant rate of ${}_x=5ra\frac{d}{s}.$ If the disk does not slip, determine the normal and frictional force it exerts on the ground. Neglect the mass of shaft $AB.$

Solve problem $(21-54)$ by changing the direction of ${}_x$ and changing the diameter of the disc to be $1\mathrm{.}2$ m $,$ and making ${}_x$ not constant but accelerating by $2ra\frac{d}{s^2}.$