A spool with a thread wound on it is placed on a smooth inclined plane set at an angle of 30 to the horizontal. The free end of the thread is attached to the wall as shown. The mass of the spool is m 200g, its moment of inertia relative to its own axis is I = 0.45 gm2, the radius of the wound thread layer is r = 3 cm. The acceleration of the spool axis is:
(A) 0.5ms - 2
(B) 5 ms - 2
(C) 1.4 ms - 2
(D) 14ms - 2
