Answer:
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