Here's how the gravitational force changes when you double the mass of one body while keeping the distance the same:

The gravitational force doubles.

Explanation:

Newton's Law of Universal Gravitation states:

* F = G * (m1 * m2) / r²

Where:

* F is the force of gravity

* G is the gravitational constant

* m1 and m2 are the masses of the two objects

* r is the distance between their centers

If you double the mass of one of the bodies (let's say m1), the equation becomes:

* F = G * (2m1 * m2) / r²

Notice that the only thing that changed is the factor of 2 in the numerator. This means the force of gravity is directly proportional to the product of the masses. Therefore, doubling one mass doubles the gravitational force.