Bicycle Wheel Gyro

A visitor sits in a rotating chair and holds a rapidly spinning bicycle wheel by handles attached to the center hub. As the visitor tips the bicycle wheel to one side, the chair begins to rotate either right or left, depending on the direction the wheel is spinning. The bicycle wheel can also be hung from a freely rotating cable by an eye loop in one of its handles. Instead of flopping down (which it will do if it isn’t spinning), it remains upright and “revolves” around the suspension cable. This exhibit shows the strange, non-intuitive attributes of spinning gyros. Any object that spins will hold to its axis until a force is applied from outside.