Physics - Old Questions

7. A large wheel of radius 0.4m and moment of inertia 1.2 kg-m², pivoted at the center, is free to rotate without friction. A rope is wound around it and a 2-kg weight is attached to the rope. When the weight has descended 1.5m from its starting position (a) what is its downward velocity? (b)what is the rotational velocity of the wheel?