Asoccer ball kicked on a level field has an initial vertical velocity component of 15.0 meters per second. assuming the ball lands at the same height from which it was kicked, what is the total time the ball is in the air?

The total time the ball is in the air = 3.06 seconds

Explanation:

Considering vertical motion of ball:-

Initial velocity, u =  15 m/s

Acceleration , a = -9.81 m/s²

Displacement, s = 0 m

We have equation of motion s= ut + 0.5 at²

Substituting

   s= ut + 0.5 at²

    0 = 15 x t + 0.5 x -9.81 x t²

    4.905t = 15

       t = 3.06 s

The total time the ball is in the air = 3.06 seconds

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from wikipedia