A toy top has a rod with a diameter of 8.0 mm and a disk of mass 0.0125 kg and diameter of 3.5 cm. The moment of inertia of the rod can be neglected. The top is spun in 0.50 s by wrapping a string around the rod and pulling it from rest to a velocity of 3.0 m/s. What is the resulting angular acceleration of the top?