1. Potential energy- energy that is stored in by an object. 2. Gravitational potential energy- achieved by doing work against the force of gravity. 3. Work- the transfer of mechanical energy. 4. Kinetic energy- the energy of motion. 5. Mechanical energy- combination of kinetic and potential energy. 6. Work-Kinetic energy theorem- the special relationship between doing work on an object and the resulting kinetic energy of the object. 7. Negative work- removes energy from an object. 8. Positive work- adds energy to an object. 9. Conservative force- when a force does work on an object and the amount of work done is independent of the path taken. 10. Non-conservative force- when a force does work on an object and the amount of work done is path-dependent.