Strange Attractor: Observe Chaotic Motion

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In this activity, learners can observe chaotic motion. A magnet tied to a piece of string makes a pendulum, which swings over three sets of fixed magnets. The force of gravity plus magnetic attraction and repulsion combine to influence the pendulum in very complex ways, resulting in unpredictable motion. Two hallmarks of chaotic systems are unpredictability and a sensitive dependence on initial conditions. Ask learners if they can think of any other systems that are chaotic!

Quick Guide

Preparation Time:
5 to 10 minutes
Learning Time:
30 to 45 minutes
Estimated Materials Cost:
$5 - $10 per group of students
Age Range:
Ages 14 - adult
Resource Types:
Activity, Demonstration
Language:
English

Materials List (per group of students)

  • A ring stand and a clamp
  • 4 to 6 ceramic magnets (available at Radio Shack)
  • Paint, masking tape, or correction fluid
  • Fishing line or string

Keywords

Subjects

  • Physical Sciences
    • Motion and Forces
      • Gravity
      • Projectile Motion
      • Center of Gravity

Audience

To use this activity, learners need to:

  • see
  • touch

Learning styles supported:

  • Involves hands-on or lab activities

Other

This resource is part of:

Access Rights:

  • Free access

By:

Rights:

Funding Sources:

  • NEC
  • NSF
  • California Department of Education