¶ Me Ball
Index Entry
Me Ball:
“In the me ball 12 rods are necessary to eliminate all the degrees of freedom, because the inital four restraints are connected to the surface of the sphere and not the center. The four points of tangency describe a square and they permit local twist and torque because a square is unstable. So each rod has to become three rods to form a stable connection and insure immobility.”
a tetrahedron for;
¶ Citations
- RBF at Penn Bell videotaping session, Philadelphia, 21 Jan’75
