'It Has to Go Down A Little, In Order to Go Around'- Following Feynman on the Gyroscope

Details 'It Has to Go Down A Little, In Order to Go Around'- Following Feynman on the Gyroscope 'It Has to Go Down A Little, In Order to Go Around'- Following Feynman on the Gyroscope

2010-07-29

arxiv.org/abs/1007.5288v1

Physics

Popular Physics

6 pages, 4 figures

Scientific paper

In this paper we show that with the help of accessible, teaching quality equipment, some interesting details of the motion of a gyroscope, typically overlooked in introductory courses, can be measured and compared to theory. We begin by deriving a simple relation between the asymptotic dip angle of a gyroscope released from rest and its precession velocity. We then describe an experiment which measures these parameters. The data gives excellent agreement with the model. The idea for this project was suggested by the discussion of gyroscopic motion in The Feynman Lectures on Physics. Feynman's conclusion (stated in colloquial terms and quoted in the title) is confirmed and, in addition, conservation of angular momentum, which underlies this effect, is quantitatively demonstrated.

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