Here's what makes free fall unique:
* Only gravity acts: No other forces are considered, like air resistance.
* Constant acceleration: The acceleration due to gravity is constant (approximately 9.8 m/s² near the Earth's surface).
* No initial velocity: This is often the case in textbook examples, but it's not a requirement. An object can be thrown upwards or downwards and still be in free fall.
Important Note: Free fall is a theoretical concept. In reality, air resistance will always play some role. However, in many situations, especially over short distances or for dense objects, air resistance is negligible, and we can approximate the motion as free fall.
