Answer questions 8-9 according to the information given below: A massless rope is wrapped around a disk of mass \( M \) and radius \( R \). The disk is free to rotate its axis of symmetry without friction. A block with mass \( m=M / 4 \) is attached to the rope and released at time \( t=0 \). g. What is the acceleration of the block? A) \( g / 2 \) (48) \( g / 3 \) C) \( g / 4 \) D) \( g / 5 \) E) \( g / 6 \) \[ \begin{array}{l} \tau_{0}=T R=I \alpha \\ T R=\frac{1}{2} M R^{2} \alpha \Rightarrow T=\frac{N R}{2} \\ T=\frac{m_{m}}{2} \end{array} \]