A student standing on the ground throws a ball straight up. The ball leaves the student's hand with a speed of 14.0 when the hand is 2.30 above the ground.How long is the ball in the air before it hits the ground? (The student moves her hand out of the way.)

Answer 1

See the 3rd link below under Related Questions.

This almost exact problem was solved there.

Answer 2

5 seconds