The document discusses the concepts of work, energy, and power in physics. It explains conservation of energy using examples like a trebuchet and simple pendulum. It defines work done as the product of force and displacement in the direction of force. Power is defined as the rate of doing work, or the change in energy over time. Efficiency is discussed in the context of a hydroelectric plant.

1. Work, Energy and Power Conservation of Energy & Work Done

4. Conservation of Energy – Simple Pendulum Why was the pendulum unable to hit the face? What are the energy changes? Video

5. Conservation of Energy – Example 2 0.800 m 0.900 m 1.000 m

8. Efficiency – Hydroelectic Plant Video

9. Efficiency