1D50.40 Pail of Water

Concepts

Forces in circular motion

Overview

A pail of water is swung in a full circle and the water does not fall out when the pail is upside down. Note: this demonstration is appropriate for large lecture halls.

Details

Equipment

  • [1] Pail of water

Classroom Assembly

  1. Fill the pail about 1/3 full with water.

Important Notes

  • Practice this demo in advance. Confidence and a smooth motion are required.

Script

  1. Swing the pail vertically, starting with a low amplitude and working up to large amplitudes.
  2. Continue to increase the amplitude of the swing until the pail swings in a full circle.
  3. (Optional) You may use packing chips instead of water to show that the chips fall out if the pail is stopped when upside down.
 

Additional Resources

References

  • PIRA 1D50.40

Disclaimer

  • Don't attempt this at home!

Last revised

  • 2018

Technicals

Related AV

Related demos

If you have any questions about the demos or notes you would like to add to this page, contact Ricky Chu at ricky_chu AT sfu DOT ca.