# Varying Period of a Damped Pendulum

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This Demonstration explores the effect that the rod length, damping coefficient, and initial position have on the period of a damped pendulum.

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Contributed by: Erik Mahieu (November 2013)

Open content licensed under CC BY-NC-SA

## Snapshots

## Details

The well-known equation of motion of the damped pendulum is used: , where is the angle from the vertical, is time, is the acceleration due to gravity, is the length of the pendulum, and is the damping factor.

During the solution of the differential equation, WhenEvent is triggered by the event and the resulting action collects the time at each crossing.

## Permanent Citation