1. Work and Energy

2. Work Done by a Constant Force Work: The __________done by a constant ________acting on an object is equal to the product of the magnitudes of the _____________and the component of the force _______________to that displacement Unit of work: Newton meter 1 N m = 1 Joule (J)

3. Work Done by a Constant Force If there is a force but no displacement: ________________________________

4. Work Done by a Constant Force If the force is parallel to the displacement, _________________

5. Work Done by a Constant Force If the force is at an _______________to the displacement, the ______________component of the force does the work F F║F║ F┴F┴ d

6. Work Done by a Variable Force For any force applied over a displacement the work done is the area under a ___________. x (m) F (N) x (m)

7. The average power is the total amount of __________done divided by the _________taken to do the work. If the force is constant and parallel to the displacement, Power

9. If an object is in motion, it is said to have Kinetic Energy Unit: ___________ KE is a _________, only has a magnitude (size), no direction. Kinetic Energy

10. The Work–Energy Theorem The net work on an object changes its kinetic energy:

11. Potential Energy Δy yiyi yfyf or Gravitational potential energy (PE) : FaFa mg

12. Conservation of Energy We define the total mechanical energy:

13. Conservation of Energy