Warm up To gure out your prediction, it is useful to use a problem solving strategy such as the one outlined: 1. Make two side view drawings of the situation (similar to the diagram in the Equipment section), one just as the can is released, and one after the can lands on the wheel. Label all relevant kinematic quantities and write down the relationships that exist between them. Label all relevant forces. 2. Determine the basic principles of physics that you will use and how you will use them. Determine your system. Are any objects from outside your system interacting with your system? Write down your assumptions and check to see if they are reasonable. 3. Use conservation of angular momentum to determine the nal angular speed of the rotating objects. Why not use conservation of energy or conservation of momentum? Dene your system and write the conservation of angular momentum equation for this situation: Is any signicant angular momentum transferred to or from the system? If so, can you determine it or redene your system so that there is no transfer? 4. Identify the target quantity you wish to determine. Use the equations collected in steps 1 and 3 to plan a solution for the target. If there are more unknowns than equations, reexamine the previous steps to see if there is additional information about the situation that can be expressed in an addition equation. If not, see if one of the unknowns will cancel out