* Conservative Force: Gravity is a conservative force. This means the work done by gravity depends only on the initial and final positions of the object, not the path taken.
* Closed Path: The ball starts and ends at the same point, making its trajectory a closed path.
* Work and Potential Energy: For conservative forces, the work done is equal to the negative change in potential energy. Since the ball returns to its original height, its potential energy is the same at the beginning and end, meaning the change in potential energy is zero.
Therefore, the work done by the gravitational force on the ball during its entire journey is zero.
