Answer:
[tex]v=395\;\;m/s[/tex] in upward direction.
Explanation:
Given,
Mass of ball [tex]m=0.5\;kg[/tex]
Initial speed [tex]u=415\;m/s[/tex]
time [tex]t=2\;second[/tex]
Acceleration [tex]a=-g=-9.8\;m/s^2[/tex]
By the Newton's 1st equation,
[tex]v=u+at\\v=415-9.8\times2\\v=395\;\;m/s[/tex]
The final velocity is positive, it means the direction of final velocity is upward.
