An object is thrown upwards with a speed of 14.0 m/s. How long does it take to reach its maximum height

Answer 1

use the formula

v=u+at
where
v= final velocity (0)
u= initial velocity (+14 m/s)
a= acceleration du to gravity, -9.81 m/s/s
negative because it accelerates in the negative y-direction.
t= time in seconds

Answer 2

9.99

Answer 3

1.43