Answer:
The result of the potential difference in the second demonstration, where the ball moved along the three-segment path, can be explained by the fact that the potential difference between the starting point and the end point of the path is the same as the potential difference between the starting point and ending point in the first demonstration, where the ball moved vertically. This is because potential difference is a function of the work done in moving a charge between two points, and work done is independent of the path taken.
Therefore, the potential difference measured in the second demonstration should be the same as the potential difference measured in the first demonstration, provided the starting and ending points are the same in both cases. However, due to experimental errors and uncertainties, the actual potential difference measured in the second demonstration may be slightly different from the actual potential difference measured in the first demonstration.