Chronology Current Month Current Thread Current Date
[Year List] [Month List (current year)] [Date Index] [Thread Index] [Thread Prev] [Thread Next] [Date Prev] [Date Next]

Re: [Phys-l] "unlearning"

Here a few more data points at deflection angles close to the singularity to help one get a little better feel for how the asymptotic logarithmic divergence in the period behaves for an ideal pendulum as the balanced inverted 180 degree position is closely approached.

Angle Period
0 deg 1.00000000
15 deg 1.00430058
30 deg 1.01740889
45 deg 1.04020248
60 deg 1.07318201
90 deg 1.18034060
120 deg 1.37288050
150 deg 1.76220725

170 deg 2.43936272
179 deg 3.90106516
179.9 deg 5.36686711

180 deg <infinity>

David Bowman