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2 replies

24-Ruby IV
December 18, 2020

Sorry, a potential eneggy can be negativ - see please the picture (a hard link!).

May be the problem in the function for le.

Must-be-const-0.png

24-Ruby IV
December 19, 2020

Sorry but v of vibration is one part or common v.

23-Emerald I
December 21, 2020

Courtesy of Wikipedia:

Fred_Kohlhepp_0-1608562872790.png

Had to drop the friction damping (at least first pass)

24-Ruby IV
December 21, 2020

OK!

And what about the spring energy?

23-Emerald I
December 21, 2020

And what about the spring energy?

 

You could define (as I had before) defined pendulum and spring energy separately; but you'd need to take the vector magnitude "sqrt(Vp^2 + Vv^2) to add them together.  Please also note that the solver is different from the previous version.  Velocities, lengths, and angles report different trajectories.  (Haven't figured out why just yet.)