Here's why:
* Gravity: Gravity is the force of attraction between any two objects with mass. The Earth has a large mass, so it exerts a strong gravitational pull on objects near its surface, causing them to fall towards the ground.
* Air Resistance: While air resistance plays a role, it's a secondary force. It acts in the opposite direction of the object's motion, slowing it down. In a vacuum, there is no air resistance, and the object would fall purely under the influence of gravity.
Let me know if you have any other questions!
