The G (Universal Gravitational Constant) and g (Acceleration due to gravity) are distinct entities in physics.
Acceleration due to gravity(g)
The acceleration experienced by a body under free fall is due to the gravitational force of the massive body.
- It changes from place to place.
- Acceleration due to the gravity of the earth is 9.8 m/s2
Universal Gravitational Constant(G)
The force of attraction between two objects with unit mass separated by a unit distance at any part of this universe.
- It is constant at any point in this universe.
- G = 6.67×10-11 Nm2/kg2
Relationship Between G and g
The relationship between G (universal gravitational constant) and g (acceleration due to gravity)
- g is the acceleration due to the gravity of any given body in m.s-2
- G is the universal gravitational constant in Nm2.kg-2
- R is the radius of the given body in km
- M is the mass of the given body in kg