The Lee-Tseung Lead Out Theory

[Top Gun]

Please do the analysis and show me tension in string is doing work pls. As far as my knowledge goes, tension in string is a passive force which is not doing any work. (WRONG - will explain later) For example when in initial position, tension in string is = mg. Will the pendulum move itself? If you apply a pull, please show me how tension starts acting as a active force and starts pulling the pendulum up? Resolve all your applied and internal forces at the initial stage and show when exactly tension starts working!

Dear Kul_ash,

I am reproducing the diagram from ideal.zip ? Ideal Lee-Tseung Pull1.xls.  I shall call it Pendulum30.jpg.

This file illustrates the case of the Ideal Lee-Tseung Pull.  The notations used are different from the ones previously displayed.  The three forces are now illustrated as:
(1)   Weight of the bob = F1g = M 
(2)   Tension of the string = F1s
(3)   External Force applied tangentially = F1p

Note that the External Force applied is not horizontal.  It has an upward component contributing directly to lifting the bob upwards.  When the pendulum is displaced at any angle a, the three forces at equilibrium obey the following relationship:
(1)   F1p = Msin(a)
(2)   F1s = Mcos(a)

I hope the different notations have not confused you.  Can you follow me so far???

[ltseung888]

Ms. Forever Yuen sent me the following photo.

The first one is the standard parallelogram of forces experiment done in secondary school physics.

In Hong Kong, each of the plastic scales costs less than US$2.  The whole set up costs less than US$10.

For those who might have forgotten their "O Level Physics" knowledge of parallelogram of forces, it is a worthwhile investment.

The board is placed horizontally.  Different tensions and different directions can be set up with the three scales.

[ltseung888]

This is the second photo Ms. Forever Yuen sent me.  One of the scale is replaced by a lead weight (pendulum bob).  The board is held vertically.

The set up is effectively pendulum08.jpg.  The Scale B can be pulled in any direction.  The previous discussions on Lee-Tseung Pull in any direction can be demonstrated.

[ltseung888]

This is the third photo Ms. Forever Yuen sent me.

It shows the case of trying to keep equal tension on Scale A and Scale B.  External Force is applied via Scale B.  There is both vertical and horizontal force and displacement of Scale B.  Thus work is clearly done by the External Force via Scale B.

However, the tension on Scale A is the same as that of Scale B.  In the vertical components, the force and work is shared equally between Scale A and Scale B.  Thus work must have been done via Scale A.  The supplier of energy is NOT Scale B.  There are no obvious "machines" to convert the direction of forces.

The more obvious possibility is Gravity doing work via Scale A.

This is the experiment set up for pendulum28.jpg.  Gravity energy has been Lead Out.

Physics and Mathematics cannot lie.  A less than US$10 investment can tell the truth.  What other evidence is needed???

[laci]

G'day Hans,

  You made me lough - and lough loudly.

  For a second I was wondering who on earth this Noodledick could be.
  Honestly, I went on to hit the Members button, and searched for a Noodledick.

  Predictably, there was no such a member. Then I had a brainstorm: this must be my friend
  Lee Tseung (of gravitational energy "leading out" fame). I once had the privilege of being lectured by
  him - and this, in turn,  has elicited my most sarcastic response.
  I certainly had fun corresponding with him.

     laci