Discussion:
"The Right Angle Lever Paradox"
(too old to reply)
Retteb
2011-01-19 15:34:48 UTC
Permalink
Raw Message
"The Right Angle Lever Paradox"

The "Right Angle Lever Paradox" is a classic construct which is taught
in most courses in Special Relativity. As with all paradoxes, it reveals
that and error has been made in our thinking. It may be interesting then to
examine this paradox and the means that is conventionally used for its
resolution.

The Right Angle Lever paradox reveals itself when we consider a right
angle lever with forces applied to the ends in two different velocity
reference frames. The arrangement is diagrammed in
http://einsteinhoax.com/re511.htm. In this diagram the lever is shown as
observed in its own reference frame in Figure B and as observed in a
reference frame which is moving at velocity V with respect to the lever in
figure A. The lever is aligned with one of its arms parallel to the velocity
vector between the reference frames and in both reference frames the lever
is observed not to rotate in response to the forces applied to its ends.

In order for the lever not to rotate in response to the forces applied
to the ends of the lever, it is necessary that the torques generated on each
of the arms be equal and opposite, as observed in both reference frames (A
and B). Because of the relativistic contraction observed for the parallel
arm, as observed in reference frame B, the moment applied to the parallel
arm is observed to be reduced by the factor (1-V^2/C^2)^0.5 multiplied by
the Lorentz Transformation for Parallel Force as compared to the moment
observed in reference frame A. In the transverse axis there is no
relativistic shortening of the lever arm and the moment applied to the
transverse arm, as observed in reference frame B is equal to the transverse
force multiplied by the Lorentz Transformation for Transverse Force and it
would seem that, for the lever not to rotate in either reference frame, the
Lorentz Transformation for Transverse Force would have to be (1-V^2/C^2)^0.5
times the Lorentz Transformation for Parallel Force. These transformations
were derived (Minkowski) and, most embarrassingly, the required relationship
was not obtained. The Lorentz
Transformation for Transverse force was found to be the inverse of what was
required to prevent the rotation of the lever, or (1-V^2/C^2)^0.5!

It was obvious early on that the paradox required a further
explanation. Either the derivation of the Parallel and/or Transverse
Transformations for force were faulty or the moments applied to the arms of
the lever did not have to balance in order to prevent rotation. Instead of
accepting that there was a flaw in the derivation(s) of the Parallel and/or
Transverse Transformations, a different and highly creative approach was
taken. It was asserted that, in reference frame B, the force applied to the
end of the parallel lever added energy to it at the rate of Fp*V and added
angular momentum to the lever at the rate of Fp*L. It was then argued that
the rate at which energy was added to the lever and the rate at which
angular momentum was added
to the lever produced equal and opposite effects and the lever did not
rotate in either reference frame! IT SHOULD BE NOTED THAT THE DISCUSSION UP
TO THIS POINT IS IN COMPLETE AGREEMENT WITH STANDARD TEXTS ON THE SUBJECT.
From this point on , however, the discussion diverges from the texts.

If one examines the expression for the angular momentum of an object
one will note that its angular momentum about an axis is the product of the
moment of inertia about that axis and the angular velocity about that axis.
Since the lever is observed not to rotate about its pivot pin axis in either
reference frame, one must conclude that, since its moment of inertia is not
infinite, ITS RATE OF CHANGE OF ANGULAR MOMENTUM MUST BE ZERO as observed in
both reference frames! Next, if one examines any text on basic mechanics one
observes that, in order for a torque to exist, a couple must also exist. (A
couple is defined by the presence of equal and opposite forces separated by
a distance. The torque is equal to the product of the separation between
these forces and their magnitudes.) In the case of the lever, the couple
results from the presence of the force at the end of the lever and the
resulting reaction force component at the hinge pin which is equal in
magnitude and opposite in direction to the force at the end of the lever.
(This is a requirement of classical mechanics. Advanced physics and cannot
be by-passed by the use of more advanced physics.) When these effects are
considered, the supposedly elegant solution to the Right Angle Lever Paradox
breaks down to the statement that
zero=zero. This is most certainly true, BUT IT IS HARDLY MEANINGFUL.

The Lorentz Transformations for Parallel and Transverse Force are
readily derived without the use of advanced mathematics or Electromagnetic
Theory (apparently used by Minkowski and which has the potential for
introducing error). All that is needed are the well known Lorentz
Transformations of the Special Theory of Relativity, the recognition that
E=M*C^2, and simple algebra.It is readily shown that the Lorentz
Transformation for Parallel Force as currently provided is correct but the
correct value for the Lorentz Transformation for Transverse Force is the
reciprocal of the accepted value. The correct transformation is 1/
(1-V^2/C^2)^)0.5. With this transformation, the right angle lever paradox is
no longer a paradox. What it signified is that the accepted derivation of
the Transformation for Transverse Force was erroneous. Apparently this error
was not recognized because it was inconceivable that a mathematical approach
could produce a faulty conclusion. Lesson:- anyone or anything can screw up.

The material which derives the writer's conclusions is provided in
http://einsteinhoax.com/relcor.htm for your reference. The writer has
received an E-mail from an individual which asserted that he had derived the
Lorentz Transformation for Transverse Force using Maxwell's Equations and
found its accepted value to be correct. He probably used the method used by
Minkowski. That method, since it involves using the velocity of light, would
probably produce the observed error since the velocity of light is must be
considered in both reference frames and velocity is measured using both
length and time. The writer doesn't know the exact nature of his error and
frankly, he doesn't care.

The source material for this posting may be found in
http://einsteinhoax.com/hoax.htm (1997); http://einsteinhoax.com/gravity.htm
(1987); and http://einsteinhoax.com/relcor.htm (1997). EVERYTHING WHICH WE
ACCEPT AS TRUE MUST BE CONSISTENT WITH EVERYTHING ELSE WE HAVE ACCEPTED AS
TRUE, IT MUST BE CONSISTENT WITH ALL OBSERVATIONS, AND IT MUST BE
MATHEMATICALLY VIABLE. PRESENT TEACHINGS DO NOT ALWAYS MEET THIS
REQUIREMENT. THE WORLD IS ENTITLED TO A HIGHER STANDARD OF WORKMANSHIP FROM
THOSE IT HAS GRANTED WORLD CLASS STATUS.

All of the Newsposts made by this site may be viewed at the
http://einsteinhoax.com/postinglog.htm.

Please make any response via E-mail as Newsgroups are not monitored on
a regular basis. Objective responses will be treated with the same courtesy
as they are presented. To prevent the wastage of time on both of our parts,
please do not raise objections that are not related to material that you
have read at the Website. This posting is merely a summary.

E-mail:- ***@verizon.net. If you wish a reply, be sure that
your mail reception is not blocked.

The material at the Website has been posted continuously for over 8
years. In that time THERE HAVE BEEN NO OBJECTIVE REBUTTALS OF ANY OF THE
MATERIAL PRESENTED. There have only been hand waving arguments by
individuals who have mindlessly accepted the prevailing wisdom without
questioning it. If anyone provides a significant rebuttal that cannot be
objectively answered, the material at the Website will be withdrawn.
Challenges to date have revealed only the responder's inadequacy with one
exception for which a correction was provided.
Chris
2011-01-22 16:57:05 UTC
Permalink
Raw Message
Nothing contracts it is an effect like perspective.

Chris.
Post by Retteb
"The Right Angle Lever Paradox"
The "Right Angle Lever Paradox" is a classic construct which is taught
in most courses in Special Relativity. As with all paradoxes, it reveals
that and error has been made in our thinking. It may be interesting then
to examine this paradox and the means that is conventionally used for its
resolution.
The Right Angle Lever paradox reveals itself when we consider a right
angle lever with forces applied to the ends in two different velocity
reference frames. The arrangement is diagrammed in
http://einsteinhoax.com/re511.htm. In this diagram the lever is shown as
observed in its own reference frame in Figure B and as observed in a
reference frame which is moving at velocity V with respect to the lever in
figure A. The lever is aligned with one of its arms parallel to the
velocity vector between the reference frames and in both reference frames
the lever is observed not to rotate in response to the forces applied to
its ends.
In order for the lever not to rotate in response to the forces applied
to the ends of the lever, it is necessary that the torques generated on
each of the arms be equal and opposite, as observed in both reference
frames (A and B). Because of the relativistic contraction observed for the
parallel arm, as observed in reference frame B, the moment applied to the
parallel arm is observed to be reduced by the factor (1-V^2/C^2)^0.5
multiplied by the Lorentz Transformation for Parallel Force as compared to
the moment observed in reference frame A. In the transverse axis there is
no relativistic shortening of the lever arm and the moment applied to the
transverse arm, as observed in reference frame B is equal to the
transverse force multiplied by the Lorentz Transformation for Transverse
Force and it would seem that, for the lever not to rotate in either
reference frame, the Lorentz Transformation for Transverse Force would
have to be (1-V^2/C^2)^0.5 times the Lorentz Transformation for Parallel
Force. These transformations were derived (Minkowski) and, most
embarrassingly, the required relationship was not obtained. The Lorentz
Transformation for Transverse force was found to be the inverse of what
was required to prevent the rotation of the lever, or (1-V^2/C^2)^0.5!
It was obvious early on that the paradox required a further
explanation. Either the derivation of the Parallel and/or Transverse
Transformations for force were faulty or the moments applied to the arms
of the lever did not have to balance in order to prevent rotation. Instead
of accepting that there was a flaw in the derivation(s) of the Parallel
and/or Transverse Transformations, a different and highly creative
approach was taken. It was asserted that, in reference frame B, the force
applied to the end of the parallel lever added energy to it at the rate of
Fp*V and added angular momentum to the lever at the rate of Fp*L. It was
then argued that the rate at which energy was added to the lever and the
rate at which angular momentum was added
to the lever produced equal and opposite effects and the lever did not
rotate in either reference frame! IT SHOULD BE NOTED THAT THE DISCUSSION
UP TO THIS POINT IS IN COMPLETE AGREEMENT WITH STANDARD TEXTS ON THE
SUBJECT. From this point on , however, the discussion diverges from the
texts.
If one examines the expression for the angular momentum of an object
one will note that its angular momentum about an axis is the product of
the moment of inertia about that axis and the angular velocity about that
axis. Since the lever is observed not to rotate about its pivot pin axis
in either reference frame, one must conclude that, since its moment of
inertia is not infinite, ITS RATE OF CHANGE OF ANGULAR MOMENTUM MUST BE
ZERO as observed in both reference frames! Next, if one examines any text
on basic mechanics one observes that, in order for a torque to exist, a
couple must also exist. (A couple is defined by the presence of equal and
opposite forces separated by a distance. The torque is equal to the
product of the separation between these forces and their magnitudes.) In
the case of the lever, the couple results from the presence of the force
at the end of the lever and the resulting reaction force component at the
hinge pin which is equal in magnitude and opposite in direction to the
force at the end of the lever. (This is a requirement of classical
mechanics. Advanced physics and cannot be by-passed by the use of more
advanced physics.) When these effects are considered, the supposedly
elegant solution to the Right Angle Lever Paradox breaks down to the
statement that
zero=zero. This is most certainly true, BUT IT IS HARDLY MEANINGFUL.
The Lorentz Transformations for Parallel and Transverse Force are
readily derived without the use of advanced mathematics or Electromagnetic
Theory (apparently used by Minkowski and which has the potential for
introducing error). All that is needed are the well known Lorentz
Transformations of the Special Theory of Relativity, the recognition that
E=M*C^2, and simple algebra.It is readily shown that the Lorentz
Transformation for Parallel Force as currently provided is correct but the
correct value for the Lorentz Transformation for Transverse Force is the
reciprocal of the accepted value. The correct transformation is 1/
(1-V^2/C^2)^)0.5. With this transformation, the right angle lever paradox
is no longer a paradox. What it signified is that the accepted derivation
of the Transformation for Transverse Force was erroneous. Apparently this
error was not recognized because it was inconceivable that a mathematical
approach could produce a faulty conclusion. Lesson:- anyone or anything
can screw up.
The material which derives the writer's conclusions is provided in
http://einsteinhoax.com/relcor.htm for your reference. The writer has
received an E-mail from an individual which asserted that he had derived
the Lorentz Transformation for Transverse Force using Maxwell's Equations
and found its accepted value to be correct. He probably used the method
used by Minkowski. That method, since it involves using the velocity of
light, would probably produce the observed error since the velocity of
light is must be considered in both reference frames and velocity is
measured using both length and time. The writer doesn't know the exact
nature of his error and frankly, he doesn't care.
The source material for this posting may be found in
http://einsteinhoax.com/hoax.htm (1997);
http://einsteinhoax.com/gravity.htm (1987); and
http://einsteinhoax.com/relcor.htm (1997). EVERYTHING WHICH WE ACCEPT AS
TRUE MUST BE CONSISTENT WITH EVERYTHING ELSE WE HAVE ACCEPTED AS TRUE, IT
MUST BE CONSISTENT WITH ALL OBSERVATIONS, AND IT MUST BE MATHEMATICALLY
VIABLE. PRESENT TEACHINGS DO NOT ALWAYS MEET THIS REQUIREMENT. THE WORLD
IS ENTITLED TO A HIGHER STANDARD OF WORKMANSHIP FROM THOSE IT HAS GRANTED
WORLD CLASS STATUS.
All of the Newsposts made by this site may be viewed at the
http://einsteinhoax.com/postinglog.htm.
Please make any response via E-mail as Newsgroups are not monitored on
a regular basis. Objective responses will be treated with the same
courtesy as they are presented. To prevent the wastage of time on both of
our parts, please do not raise objections that are not related to material
that you have read at the Website. This posting is merely a summary.
your mail reception is not blocked.
The material at the Website has been posted continuously for over 8
years. In that time THERE HAVE BEEN NO OBJECTIVE REBUTTALS OF ANY OF THE
MATERIAL PRESENTED. There have only been hand waving arguments by
individuals who have mindlessly accepted the prevailing wisdom without
questioning it. If anyone provides a significant rebuttal that cannot be
objectively answered, the material at the Website will be withdrawn.
Challenges to date have revealed only the responder's inadequacy with one
exception for which a correction was provided.
Loading...