Answer:
-6.2 m/s (downward)
Explanation:
The velocity of an object thrown vertically upward is given by:
[tex]v= u + at[/tex]
where:
u is the initial velocity
a = g = -9.8 m/s^2 is the acceleration due to gravity
t is the time
In this problem,
u = 27.1 m/s
t = 3.4 s
So, the velocity after 3.4 s is
[tex]v=27.1 m/s + (-9.8 m/s^2)(3.4 s)=-6.2 m/s[/tex]
and the negative sign means the velocity points downward.
