In a circus act, an acrobat rebounds upward from the surface of a trampoline at the exact moment that another acrobat, perched 9.0 m above him, releases a ball from rest. while still in flight, the acrobat catches the ball just as it reaches him.
if he left the trampoline with a speed of 5.6 m/s, how long is he in the air before he catches the ball? (express your answer in second)