Part 1

1. Describe the energy changes that occur when an athlete "pole-vaults". Step by step, begin with eating breakfast and end on the landing pad.
2. A frictionless pendulum is set in motion:
   1. What is the energy transformation that occurs as it swings?
   2. How does conservation of energy apply?

Part 2

1. What is the difference between diffraction and refraction? Give an example of each.