* Gravity's Constant Influence: The primary force acting on the ball is gravity. Gravity constantly pulls the ball downwards, causing its upward velocity to decrease as it rises.
* Changing Velocity: As the ball travels upwards, its velocity continuously decreases until it momentarily reaches zero at its highest point. Then, as it falls back down, its velocity increases in the downward direction. This change in velocity over time indicates non-uniform motion.
* Uniform Motion Requires Constant Velocity: Uniform motion implies that an object moves with a constant velocity (both speed and direction). Since the ball's velocity is changing, it cannot be considered uniform motion.
In summary: The ball thrown upwards experiences a changing velocity due to the constant influence of gravity. This makes its motion non-uniform.
