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How to Construct a Pendulum

Physicists classify a pendulum as a simple machine, which means that it is a construction capable of movement and is composed of few parts. You only need a weighted object, string, and something from which to suspend the aforementioned components. Though pendulums appear to swing from side-to-side, they also rotate in a slight ellipse as they go back and forth. The rotation of the Earth causes the pendulum to move in this manner. As a result, scientists use them to gain insight into the planet's movements in the solar system.

Things You'll Need

Bucket
Stick or rod
String
Small, weighty object

Instructions

- 1
  Cut a piece of string that is at least two inches shorter than the depth of the bucket.
- 2
  Tie one end of the string around a small, weighty object like a bouncy ball, magnet or coin. While you can tie the string around almost any object, it will be helpful to choose an object with a whole or other opening to make tying the string easier.
- 3
  Tie the other rend of the string in the center of the stick or rod.
- 4
  Drop the weighted object into the bucket. Rest the stick across the top of the bucket to suspend the pendulum.
- 5
  Push the string or object to initiate its rotational movements.

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