THE LESSON PLAN
- Show the class the different cylinder types, pass the cylinders around and ask them to note some properties of each cylinder -- i.e. mass, radius, material etc.
- Propose a race between the different cylinder types and ask the class which they think is going to win.
- If they get it wrong ask them what they think is going on? What is causing one to be faster than the other?
- Try to have the class realize that we have a case of energy conservation without telling them outright.
- Talk about the conservation of energy and the subcategories of potential and kinetic energy.
- Introduce rotational kinetica energy and how Moment of Inertia and Angular velocity are analogs to Mass and Velocity respectively.
- Explain how angular velocity is related to translational velocity.
- Have the class solve for the theoretical velocity for the solid cylinder.
- Run a quck experiment to measure the real speed of the cylinders at the bottom of the ramp and compare it to the theoretical velocity.
- If they are different ask what are the reasons for this?
- End presentation.
- Get the class to try and solve for the velocity