Here's why:

* Gravity's Constant Pull: The force of gravity acts on all objects equally, pulling them towards the center of the Earth with a constant acceleration of approximately 9.8 m/s². This acceleration is independent of an object's mass or shape.

* Air Resistance as a Counterforce: Air resistance is a force that opposes the motion of an object through the air. It depends on factors like the object's shape, size, and speed. The more air resistance an object experiences, the slower it falls.

* Net Acceleration: The acceleration an object experiences in free fall is the net effect of gravity pulling it down and air resistance slowing it down.

However, the object with less air resistance will fall *faster* because it experiences less opposition to its motion.

Here's an example:

* A feather and a bowling ball dropped from the same height will both experience the same gravitational acceleration. However, the feather has much more air resistance than the bowling ball. This means the feather will fall much slower than the bowling ball, even though they both have the same gravitational acceleration.

In a vacuum, where there is no air resistance, all objects would fall at the same rate regardless of their mass or shape. This is a fundamental principle of physics.