* 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.
* Constant Distance: When we're close to the Earth's surface, the distance between the object and the center of the Earth is relatively constant.
* Mass of the Earth Dominates: The mass of the Earth is vastly greater than the mass of any object near its surface. This means the Earth's gravitational pull dominates, and the object's mass has a negligible impact.
Think of it this way: A feather and a bowling ball will fall at the same rate in a vacuum (where air resistance is eliminated). This demonstrates that their masses don't influence their acceleration due to gravity.
Important Note: This holds true only near the Earth's surface. As we move further away from the Earth, the gravitational force weakens, and the object's mass becomes a more significant factor in its acceleration.