Here's a breakdown:
* Free Fall: This means an object is moving under the sole influence of gravity. There are no other forces acting on it, like air resistance.
* Gravity: This is a fundamental force of nature that attracts any two objects with mass. The more mass an object has, the stronger its gravitational pull. The Earth has a lot of mass, so it exerts a strong gravitational pull on objects near its surface.
In simpler terms: When you drop something, it falls towards the Earth because the Earth's gravity pulls on it.
