The amount of mass an object has does affect its acceleration due to gravity. Here's why:

* Newton's Law of Universal Gravitation: This law states that the force of gravity between two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.

* Acceleration due to Gravity: The acceleration due to gravity (g) is the acceleration experienced by an object due to the force of gravity. It's determined by the mass of the planet (or other celestial body) and the distance from its center.

Therefore:

* A more massive object experiences a greater force of gravity, but it also has more inertia (resistance to change in motion).

* The acceleration due to gravity (g) is constant for all objects near the Earth's surface, regardless of their mass.

Key Point: While the force of gravity on a more massive object is greater, the extra inertia it possesses cancels out the effect, resulting in the same acceleration due to gravity.

Let me know if you have any other questions!