Question

what do you mean by gravitation force

Answer 1

The gravitational force is a force that attracts any objects with mass. You, right now, are pulling on every other object in the entire universe! This is called Newton's Universal Law of Gravitation. ... And if you triple the distance between two objects, you reduce the force to a ninth.

Answer 2

It is a mass forced that attractions the object toward the down.
It is the force of all earth.