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

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