Science Fair Projects World

Exploring Simple Harmonic Motion with a Pendulum




Investigate the principles of simple harmonic motion using a simple pendulum.


  • String
  • Weight (e.g., metal washer, small rock)
  • Protractor
  • Timer
  • Ruler
  • Notebook for recording data


  1. Construct a simple pendulum by attaching a weight to one end of a string and securing the other end.
  2. Measure the length of the string and the angle of displacement using a protractor.
  3. Release the pendulum from a small angle and use a timer to measure the period of oscillation.
  4. Repeat the experiment with different string lengths and angles of displacement.
  5. Record and analyze the data to understand the relationship between period, length, and amplitude.
  6. Present your findings in a report, discussing the principles of simple harmonic motion demonstrated by your pendulum.