When air is blown downward into the narrow opening of a funnel (Figure 18.22), a lightweight ball

Question:

When air is blown downward into the narrow opening of a funnel (Figure 18.22), a lightweight ball initially positioned below the wide opening is pulled up into the funnel and held in place. Explain how the ball can be pulled upward even though the airflow and gravity are both directed downward.

Data from Figure 18.22