What is the equal amount of force acting on both Earth and the Moon?

[XavierB]

So we know that for every action force there is an equal and opposite reaction force, but these forces act on different objects. And we know that the gravitational force acting on the Moon by Earth and the gravitational force acting on Earth by the Moon is equal. But what amount is this equal force?

For example, Earth is a million tons and the Moon is ten thousand tons and the gravitational force acting on each of them is equal. How could you find the value of this equal force and what would it be?

Any further explanations or answers would be great, thanks.

 

[Mmm_Pasta]

http://en.wikipedia.org/wiki/Newton's_law_of_universal_gravitation

Just look up the values for the masses of the Earth and Moon and the separation of their centers of mass.