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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 15 s. The acceleration of gravity is 9.81 m/s2 .

How tall is the tower? Answer in units of m

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AMB000

Answer:

L=55.9m

Explanation:

The equation for the period of a simple pendulum is:

[tex]T=2\pi\sqrt{\frac{L}{g}}[/tex]

In our case what we know is the period and the acceleration of gravity, and we need to know the length of the pendulum, so we can write:

[tex]L=(\frac{T}{2\pi})^2g[/tex]

Which for our values is:

[tex]L=(\frac{15s}{2\pi})^2(9.81m/s^2)=55.9m[/tex]

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