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Pit & Pendulum

Line in the sand

  • Instant relaxation for your office or home
  • Physics in motion
  • Some assembly required
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$29.99

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Line in the sand

The conical pendulum has been studied for centuries. Watching its circular motion has brought us greater understanding about the movements of the planets and the theory of gravity. 

But not just gravity. Also tension. It is the interplay between these two forces that primarily describe the patterns in which the bob moves. (We're going to ignore air resistance for now.) It's a beautiful dance, but it's difficult to see just how elegant and complex the back-and-forth is until you find a way to track the movement. By sharpening the mass to a point and having it describe its path through a shallow dish of sand, you can see the arc the pendulum traces on its regular rhythmic cycle as it is torn between the two forces. Back and forth, to and fro, the pendulum swings into gorgeous elliptical loops and whorls. 

Product Specifications  
  • Pit & Pendulum
  • Instant relaxation for your office or home
  • Materials: Wooden scaffold and base, stainless steel bob and arm
  • Includes sand 
  • Some assembly required
  • Dimensions: 6 3/4" square base x 15 1/4" tall
  • Weight: 1 lb. 6 oz.
  • Warning: This is NOT a toy. Use with extreme care. This product contains a functional sharp edge. Keep away from children.
  • Ages 14+

Pit & Pendulum Video:

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