What is the magnitude of the gravitational force acting on an object?

The magnitude of the gravitational force acting on an object is weight

Explanation:

In introductory physics textbook, we can find that weight is nothing but a force applied on a given body, by earth's gravity. It is denoted by the formula as,

                                         W = mg

where 'W' is the weight, 'm', is the body's mass, and 'g', the acceleration due to its gravity. When a ball is thrown high into the air, there is no friction. Friction is eliminated. Now, inertia is just a resistant force to change of motion. Hence, the only possibility is weight.

option a is the correct answer

Explanation:

Galaxies rotate around their centers with the sections of the galaxy that are farther out from the galaxy's center rotating more slowly than the material closer to the center. Galaxies are also moving away from each other due to the expansion of the Universe brought on by the Big Bang.