#### pmb

**"Right-angle lever paradox" - Am. J. Phys.**

I'd like to read this article

"Right-angle lever paradox," J. Charles Nickerson and Robert T.

McAdory, Am. J. Phys. 43, 615 (1975)

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Abstract: 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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But I don't have ready access to a library. Does anyone have this article? If so then can you e-mail a scanned copy to me? Thanks

Pete