Question

is gravitational force always weaker than force of gravity. Beacuse if we take gravitational force between sun and mercury it seems to be more than force of gravity of earth and moon​.

Answer 1

Answer:

As pointed out in another answer, the gravitational force is proportional to the masses of the objects and inversely proportional to the square of the distances. That is,

F = G*M1*M2 / R^2 , where G is the gravitational constant

So: Mass of Sun / (Sun-Moon distance)^2 = 8.9 x 10^7 kg/m^2

And: Mass of Earth / (Earth-Moon distance)^2 = 4.0 x 10^7 kg/m^2

Amazingly close. The gravitational force between the Sun and the Moon is about twice that between the Earth and the Moon.

Answer 2

Answer:

As pointed out in another answer, the gravitational force is proportional to the masses of the objects and inversely proportional to the square of the distances. That is,

F = G*M1*M2 / R^2 , where G is the gravitational constant

So: Mass of Sun / (Sun-Moon distance)^2 = 8.9 x 10^7 kg/m^2

And: Mass of Earth / (Earth-Moon distance)^2 = 4.0 x 10^7 kg/m^2

Amazingly close. The gravitational force between the Sun and the Moon is about twice that between the Earth and the Moon.