Answer:
Vf = 68.67[m/s]
Explanation:
To solve this problem we must use the following kinematics equation:
[tex]v_{f} = v_{i}-(g*t )[/tex]
where:
Vf = final velocity [m/s]
Vi = initial velocity = 0
g = gravity = - 9.81 [m/s2]
t = time = 7 [s]
Vf = 0 - (-9.81*7)
Vf = 68.67[m/s]
