Re: "The Right Angle Lever Paradox"

Bilge wrote:
Koobee Wublee: >Actually, the solution to resolve this paradox is ridiculously simple.
>If the lever is not rotating in the rest frame, the forces acting on
>each level must be identical (only one shown in Retic's diagram). In
>the moving frame, both of these forces on each lever would undergo the
>same transformation of observation.
Wrong. That is not the resolution.

I interpreted Wublee's response such that it is indeed correct, albeit poorly stated: consider a small portion of one part of either lever -- the total force is zero in the rest frame (because it is not moving), so the external force and the internal forces (from neighboring portions of the lever) must therefore cancel; that means they are equal and opposite, and since anti-parallel forces transform the same, the same conclusion must hold in the moving frame.

The poor part of his statement is "the forces" -- _which_ forces???


> Forces perpendicular to and
> parallel to the transformation transform differently.

This is true, but given my interpretation of his writing it is not relevant.


>However, the Twin's Paradox is still a paradox that needs to be
>resolved.

Only because you don't understand its resolution,

Agreed.


Tom Roberts
.

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