Right‐angle lever paradox
作者:
J. Charles Nickerson,
Robert T. McAdory,
期刊:
American Journal of Physics
(AIP Available online 1975)
卷期:
Volume 43,
issue 7
页码: 615-621
ISSN:0002-9505
年代: 1975
DOI:10.1119/1.9761
出版商: American Association of Physics Teachers
数据来源: AIP
摘要:
We present the problem of relativistic torques with particular reference to the right‐angle lever problem and outline a simple solution. The important elements of our solution are, first, a reexamination of the classical relation between torque and angular momentum and, second, the consequent realization that in relativistic analysis there exists a net internal torque which exactly cancels the net external torque experienced by an extended body in dynamic equilibrium. We find that the lever has constant angular momentum according to all Lorentz inertial reference systems and that this is consistent with the relativistic relationship between torque and angular momentum. Our solution is not restricted to relativity. It is valid for a wider class of theoretical frameworks.
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