1. Associate Professor: C. H.L IAO

2. Contents:  5.1 Introduction 182  5.2 Gravitational Potential 184  5.3 Lines of Force and Equipotential Surfaces 194  5.4 When Is the Potential Concept Useful? 195  5.5 Ocean Tides 198

3. 5.1 Introduction For 2 particles For continuous distribution system

4. Definition of the Gravitational field vector, g For 2 particles For continuous distribution system

5. For 2 particles For continuous distribution system

7. Example 5-1

9. The solution will be divide in three regions:

10. Example 5-2

12. Example 5-3

26. Solution of 5.2

29. Solution of 5.3

31. Solution 5.7

34. Solution of 5.10