2. What was the average velocity of the ball as it fell?

5 m/s

Explination:In fact, the ball's average velocity during its second of fall is 5 m/s (= (0 m/s + 10 m/s)/2). For half of the second the ball has been going less than 5 m/s, and for half of the second the ball's speed has been more than 5 m/s.

gravity

explanation:

the entire statement is true and correct.  

there's no diagram, nothing is illustrated, and no question is asked.