Answer to Question #14299 in Mechanics | Relativity for Jonathan
from the equation
for displacement (assume the axis is directed downwards and
the origin is on the top of a tower):
h = g * t^2 / 2,
t = sqrt(2h /
Now let's use the equation for the speed when the wrench falls
V = g * t = g * sqrt(2h / g) = sqrt(2 * g * h).
sqrt(2 * 9.81 * 80) = 39.6 m/s.
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