Answer:
Vf = 86.34 [m/s]
Explanation:
To solve this problem we must use the following equation of kinematics.
[tex]v_{f} ^{2} =v_{o} ^{2} +2*g*y[/tex]
where:
Vf = final velocity [m/s]
Vo = initial velocity = 0 (falls from the rest)
g = gravity acceleration = 9.81 [m/s²]
y = distance = 380 [m]
Vf² = 0 + (2*9.81*380)
Vf = 86.34 [m/s]
Note: The pisitive sign in the equation above means that the movement goes in the same direction of the gravity acceleration, therefore the velocity is increasing when the penny falls.
