Ball 1: Dropped

* Acceleration: The only force acting on the ball is gravity. Therefore, its acceleration is equal to the acceleration due to gravity, which is approximately 9.8 m/s² downwards.

Ball 2: Thrown Downward

* Acceleration: Like the first ball, the primary force acting on this ball is gravity. Even though it has an initial downward velocity, the acceleration remains constant at 9.8 m/s² downwards.

Important Note: Acceleration is a measure of how much the velocity changes over time. Even though the second ball starts with a non-zero velocity, gravity will still cause its speed to increase at a rate of 9.8 m/s every second.