At the beginning of a basketball game, a referee tosses the ball straight up with a speed of 5.4 m/s. A player cannot touch the ball until after it reaches its maximum height and begins to fall down. What is the minimum time that a player must wait before touching the ball?

Answer 1

(5.4 m/s)/g

That is how long it takes for the speed to reach zero, which occurs at the maximum height.

g is the acceleration of gravity. I assume you know its value.

Answer 2

0.447