Worcester Polytechnic Institute

Period of a pendulum

Objective:

Determine the limitations of the linear pendulum model.

Background:

The linear pendulum model given in class is valid only so long as is small enough to make a reasonable approximation.

Problem:

Construct a pendulum whose period you can measure conveniently. Release the pendulum bob from rest from an angle small enough to ensure the validity of the linear pendulum model. Compare the measured period with the period predicted by both the linear and the nonlinear (given in class) models.

Repeat the experiment with an initial displacement large enough to render the linear model invalid. Again compare the measured period with the values predicted by the linear and nonlinear models. Comment on the relationships you observe.

What is the primary limitation in the linear pendulum model? In the nonlinear pendulum model. What confidence do you have in these two models?




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Art Heinricher < heinrich@wpi.edu>
Last modified: Thu Jun 26 12:35:20 EDT 1997