CORKSCREW

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 Z-X plane, 1 for moving the circle up and down along the Y-axis)

*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 major frequency was observed ~1.3 Hz, which can be attributed to the frequency of the circles in the Z-X plane. There is a large amount of noise in this signal due to the fact that the rotations are happening in the horizontal plane with a periodic vertical motion.

Equations to characterize trick:

• X = sin(4t)
• Y = sin(t)
• Z = cos(4t)