You need to know the height of a tower, but darkness obscures the ceiling. You note that a pendulum extending from the ceiling almost touches the floor and that its period is 12s. The acceleration of gravity is 9.81 m/s2. How tall is the tower in units of m?
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The period of a simple pendulum (a mass attached to a string) is given ...
This solution contains step-by-step calculations to determine the height of the tower. All formulas used are included.