The periodic time of a pendulum:

$\overline{)\begin{array}{rcl}{\mathbf{T}}& {\mathbf{=}}& \mathbf{2}\mathbf{\pi}\sqrt{\frac{\mathbf{L}}{\mathbf{g}}}\end{array}}$

The mass in a pendulum clock completes one complete swing in 2.50s .

What is the length of the rod?

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Our tutors have indicated that to solve this problem you will need to apply the Simple Harmonic Motion of Pendulums concept. You can view video lessons to learn Simple Harmonic Motion of Pendulums. Or if you need more Simple Harmonic Motion of Pendulums practice, you can also practice Simple Harmonic Motion of Pendulums practice problems.