Pit & Pendulum - Chrome

Large Model
The large chrome pit & pendulum is molded from a special hard resin which is metal plated in chrome. This metal-plated Pit & Pendulums is expensive looking and cotemporary in design.

The large chrome pit & pendulum is 24" tall and measures 9" X 11" at the base.

Small chrome pit & pendulum
The small chrome model is a desktop version of the large model with chrome plated metal parts.

The small chrome pit & pendulum is 12" tall and measures 5 ½" x 8" at the base.

The motion of a pendulum demonstrates many things, both scientific and metaphysical. Some pendulums are used to verify the fact that the earth is rotating beneath us, and others, such as ours have the ability to create ever-changing geometric designs.
Ideally the pendulum should just barely scratch the surface of the sand. This will enable it to swing longer and make more detailed designs.
Observe the pendulum in motion and see how it will swing in narrowing circles and ovals until it is making a nearly straight line. Then watch as it reverses it's direction and begins to swing in an opposite direction turning clockwise then counter-clockwise and back again repeatedly.
Within a few minutes you will see how the circles and curved lines begin to create perfect squares and rectangles in the sand, defying what you would expect the pendulum to do. Try starting the pendulum from different directions and you can change the types of designs.
By moving the rocker arm on the acrylic model at different angles in the grooves at the top of the arm, you will be able to change the orientation of the designs and create different patterns.
For those interested, the pendulum converts kinetic energy (energy in motion) into potential energy (energy at rest). When the pendulum momentarily stops at the top of it's arc, it is at the point of it's greatest potential energy and has zero kinetic energy. Potential energy then converts back to kinetic energy as the pendulum begins its swing. During the swing kinetic energy grows stronger and is at it's greatest when the pendulum is at the bottom of it's arc.
The pendulum also looses energy with each oscillation as witnesses by the patterns in the sand growing smaller and smaller. Once properly set up, the Pit and Pendulum can be fascinating to watch.