GENERAL PHYSICS II Math. Edu. Program

1. GENERAL PHYSICS IIMath. Edu. Program Yohanes Edi Gunanto TC - UPH

2. Energy, Work, and Power

3. Forms of Energy • kinetic energy • gravitational energy • elastic energy • thermal energy • electrical energy • chemical energy • electromagnetic energy • nuclear energy • mass energy

4. Energy Transformations • Falling water releases stored ‘gravitational potential energy’ turning into a ‘kinetic energy’ of motion. • Human beings transform the stored chemical energy of foodinto catabolic energy • Burning gasoline in car engines converts ‘chemical energy’ stored in the atomic bonds of the constituent atoms of gasoline into heat • Stretching or compressing a spring stores ‘elastic potential energy’ that can be released as kinetic energy

6. Kinetic Energy

8. Kinematics : An Integral Theoremfor One Dimensional Motion

9. Newton’s Second Law: AnIntegral Theorem for OneDimensional Motion Newton’s Second Law If F is not constant, then (in one dimension), Therefore the integral theorem coupled with Newton’s Second Law becomes

10. Work Done by a Constant Force for One Dimensional Motion Definition:

12. Work-Kinetic Energy Theoremfor One Dimensional Motion • Work-energy theorem is the statement that the work done by a force in displacing an object is equal to the change in kinetic energy of the object

13. Work and the Dot Product

19. Checkpoint Problem: Is Kinetic Energy Constant ?

25. Potential Energy and Conservation of Energy

27. Example: Gravitational Force • Consider the motion of an object under the influence of a gravitational force near the surface of the earth • The work done by gravity depends only on the change in the vertical position

36. THANKS