Basics of Gravitation

1. GRAVITATION

2. Newton's Law of Universal Gravitation

3. ● Gravitational force is a conservative force.
● Gravitational force is a central force.
● Gravitational force is equal in magnitude & opposite in direction
● Gravitational forces are action - reaction pair.
● Gravitational force acts along the line joining the two masses.
● Gravitational force doesn't depend upon the medium
● Gravitational force is an attractive force.

9. GRAVITATIONAL FIELD
We can state by Newton's universal law of gravitation that every mass M produces, in
the region around it, a physical situation in which, whenever any other mass is placed,
force acts on it, is called gravitational field. This field is recognized by the force that the
mass M exerts another mass, such as m , brought into the region.

11. Gravitational Field Strength of Point Mass

13. Gravitational Field Strength of Earth:
Value of g on Earth's Surface :

14. Value of g at a Height h Above the Earth's Surface:

15. Value of g at a Depth h Below the Earth's Surface

18. Effect of Earth's Rotation on Value of g

20. Thank You