2 Beat

Degrees of freedom: 3*

This trick is essentially moving a circle between two planes, so there are 3 degrees of freedom (2 for circular motion within Y-Z plane, 1 for moving the circle back and forth along the X-axis in the global reference frame)

*Assuming poi is a point mass. For more information on planes and this assumption, see the technical info page here

Expected and observed frequencies:

One fundamental frequency is observed at the base rate of ~1 Hz, however more noise is observed in this signal when compared to the circle due to the spinners crossing their hands over their body

Equations to characterize trick:

• X = sin(t)
• Y = cos(2t)
• Z = sin(2t)