1. Friction is a non-conservative force. True or False?

2. A friend comments that a wind turbine creates energy. Using what you know about the law of conservation of energy, would you support your friend's comment? Why or why not?

3. Why are the turbines for hydroelectric dams located far below the top of the dam instead of being at the top?

4. A semi truck and a smart car have the same kinetic energy. How is this possible?

5. A person is riding a skateboard on a U-shaped ramp. At what point does the person have the greatest POTENTIAL ENERGY?

6. A person is riding a skateboard on a U-shaped ramp. At which point does the person have the greatest KINETIC ENERGY?

7. Gravitational acceleration is used to calculate gravitational potential energy. On Earth, this value is 9.8 m/s2. We have practiced calculating gravitational force in unit 3. Connect what you know about gravitational force to gravitational acceleration and Kinetic Energy.