Cyclotron analog applied to the measurement of rolling friction
作者:
Ian Edmonds,
Nicholas Giannakis,
Chris Henderson,
期刊:
American Journal of Physics
(AIP Available online 1995)
卷期:
Volume 63,
issue 1
页码: 76-80
ISSN:0002-9505
年代: 1995
DOI:10.1119/1.17772
出版商: American Association of Physics Teachers
关键词: CYCLOTRONS;ROLLING FRICTION;EDUCATIONAL TOOLS;GRAVITATION
数据来源: AIP
摘要:
A simple and inexpensive analog of the cyclotron, ideal for demonstrating the concept of the cyclotron to large classes, is presented. A metal ball, constrained by a centrally directed spring force to follow a circular path over a plane surface, is accelerated by an alternating gravitational force provided manually. A simple method of recording the orbital radius of the ball in the analog provides a sensitive method of measuring the velocity dependent rolling friction force,F=a+bv. Values ofaandbfor rough and smooth wood surfaces are found and the mechanism by which the losses associated with rolling friction arise is discussed.
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