Yes, gravity accelerates all masses at the same rate, regardless of their mass. This is a fundamental principle of physics known as the equivalence principle.

Here's why:

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

* Newton's Second Law of Motion: This law states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass (a = F/m).

Combining these two laws, we can see that the force of gravity on an object is proportional to its mass, but the acceleration is independent of its mass. This means that a feather and a bowling ball will fall at the same rate in a vacuum, because the increased force of gravity on the bowling ball is perfectly balanced by its increased inertia.

Important Note: This only applies in a vacuum. In the presence of air resistance, lighter objects will experience more air resistance and fall slower.