* Gravity acts independently: The force of gravity acts vertically downwards. The horizontal velocity of the ball has no effect on how fast it falls due to gravity.
* Vertical and horizontal motion are independent: The ball's horizontal motion doesn't influence its vertical motion. The ball will fall at the same rate regardless of its horizontal speed.
Imagine this:
* Scenario 1: You drop a ball straight down.
* Scenario 2: You throw a ball horizontally at the same time.
Both balls will hit the ground simultaneously because the downward force of gravity is the only factor determining their fall time.
