A box of mass 1kg and a bag of mass 2kg are suspended from a rope passing over a pulley of moment of inertia 0.02kg*m^2 and radius 10cm. The rope does not slip with respect to the pulley. The bag is released from rest at a height of 2cm above the floor. Find the speed of the bag whe it hits the floor.

We'll be glad to help you with this, but only if you first attempt to solve it on your own. What methods have you tried? Where did you get stuck? Show some effort, and I'm sure someone will help you out.