Equilibrium
Forces and Motion

Fork Balancer

Enrichment Activity for 5-11 11-14


What you need

  • Tall glass
  • Two identical forks
  • Toothpick

Instructions

  1. Push the prongs of the two forks together
  2. Push the toothpick between the prongs to hold the forks together
  3. Balance the end of the toothpick on the side of the glass

Results and Explanation

The forks can hang off the side because all the forces are balanced.

These experiments have not been specifically safety tested for home use but we believe them to be safe if the instructions are followed. Adult supervision or direction is recommended as appropriate. All experiments are carried out at your own risk.

Equilibrium
can be analysed using Force
has the special case Thermal Equilibrium
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