But I do not understand - where is here an error.
pe - Potential energy
ke - Kinetic energy
se - Energy of springers
I have converted the sheet into Prime.
Prime works with units by the Odesolve function and points me the bug!
But Prime has not an animation!
For physics
...let's end it like this:
Anyway: I'm missing Equations derived from a dynamic balance in accordance with your outstanding simulation.
ValeryOchkov написал(а):
Fine too
Похоже ли это на улыбку, на улыбку женщины? Мы уже получали тюльпан!
Does this sound like a smile, the smile of a woman? We received Tulip!
Valery,
I need help for better understanding according to your summation of Forces of pendulum-3-hard-linking.mcdx.
I created a dynamic balance, which you can see in the sketch.
The direction of force of the slowness is allways in the opposite direction of the acceleration vektor (D' Lambert's Law)
I confirm with your equations in x-direction, but in y-direction we have different equations.
The body mass m1 moves to the left in direction of the negative x-achses and it moves downwards in direction to the negative y-achses.
So the body mass m1 accelerates (increasing speed) downwards and to the left.
I am confused if i compare my equations with yours.
How did you get it, can you show me with a short sketch?
Can you please tell me what is fact here?
Thank you!
Volker
Sorry, Volker!
I input equations and see an animation.
If the animation is fine - equations are correct.
If the animation is not fine - I change equations and see new animation!
And I think about physic of course. But in second line 
Main is a fine animation!
We have animation in Mathcad 15 but cannot work with units in Odesolve.
We can work with units in Odesolve in Prime, but Prime have not animation!
Нет в жизни счастья! 
Volker Lehner написал(а):
Valery,
I need help for better understanding according to your summation of Forces of pendulum-3-hard-linking.mcdx.
I created a dynamic balance, which you can see in the sketch.
The direction of force of the slowness is allways in the opposite direction of the acceleration vektor (D' Lambert's Law)
I confirm with your equations in x-direction, but in y-direction we have different equations.
The body mass m1 moves to the left in direction of the negative x-achses and it moves downwards in direction to the negative y-achses.
So the body mass m1 accelerates (increasing speed) downwards and to the left.
I am confused if i compare my equations with yours.
How did you get it, can you show me with a short sketch?
Can you please tell me what is fact here?
Thank you!
Volker
I have change in my model one minus to plus and see an error in the animation: the point 2 must go down not up! And forces values are not correct!
At FRAME=4 and more I got - no solution.
When minus is returned - all is correct - the point 2 goes down! And we can change FRAME value 7, 8, 8 etc and see future animation's frames!
Volker Lehner написал(а):
Hi Toby,
it's about 29 Pages.
It's allways very interresting, how the comunity solves problems and brings many Ideas to solve them.
Best, Volker
Many Soviet jokes began this way: "Russian, German and American somehow got together and began to solve one problem..." 
Toby Metcalf написал(а):
My Russian is a bit rusty Val 🙂
Google Translator + Toby = Success!
Toby Metcalf написал(а):
How long is the article?
See please the attach!
Try please the part 1, but better 1, 2 and 3
I hope you will someone know new about Mathcad and about work with it!
Valery,
Please change my Adress in the Article to:
**«Mechanical Engineering Office»
Eschenweg 4, 71576 Burgstetten, Germany
Now I'm a self made man 
Thank you!
