In one of our laboratory classes recently, in connection with a routine experiment with Kater's pendulum, certain of the students were confronted with the situation in which, although the periods of vibration from each of the two knife edges were practically identical, the distance between the knife edges was by no means equal to the length of the equivalent simple pendulum. None of the treatises on dynamics available offered any help in their difficulty. In all the discussions it was virtually stated that when the periods from the two knife edges were equal the distance between knife edges was equal to the length of the simple pendulum of equal period.
Proceedings of the Iowa Academy of Science
©1921 Iowa Academy of Science, Inc.
Sieg, L. P.
"A Note on Kater's Reversible Pendulum,"
Proceedings of the Iowa Academy of Science, 28(1), 98-102.
Available at: https://scholarworks.uni.edu/pias/vol28/iss1/19