cancel
Showing results for
Did you mean:
cancel
Showing results for
Did you mean:

24-Ruby III

## One interesting problrm with shue

I always wonder why, after a walk in the park, some of my shoes remain clean, while others are always smeared with dirt. I videotaped my walk and realized that the reason was a large welt of brown boots. Drops of water flying up can get on the shoes only if they have a certain trajectory, which depends on the initial conditions (Cauchy problem). Now I am trying to create a mathematical model (ODEs) of this process in Mathcad. Who can help me? May be this problem was solved!

12 REPLIES 12
24-Ruby III
(To:ValeryOchkov)

24-Ruby III
(To:ValeryOchkov)

A ball on an elastic band

1D model

2D model

24-Ruby III
(To:ValeryOchkov)

Pendulum-amphora

24-Ruby III
(To:ValeryOchkov)

24-Ruby III
(To:ValeryOchkov)

One more pendulum (new type!)

21-Topaz II
(To:ValeryOchkov)

Hi,

I have not yet read your request, and in any case you should know that in Italy (especially in Rome) the subject of shoes is very delicate. When in a speech the word "shoes" is present, excluding the reclames in which one speaks of the quality, of comfort and beauty of the object, in certain cases it can also take different colors that goes from the "yellow" to the "black" or even derogatory (it's a sole = not worth anything). Now I wonder what do they do with mathcad?

24-Ruby III
(To:-MFra-)

Thanks, MFra,

Here or in private letter.

I am preparing a large article on the pendulum. I write in an article that our arms and legs are the most common pendulum, a compound pendulum. I am doing a mathematical model of a man’s leg swing in a shoe in order to calculate the flight of water droplets from the toe and back of the shoe.

21-Topaz II
(To:ValeryOchkov)

Hi Valery,

very nice this pendulum. Mine, on shoes, was only a digression on the subject, which arouses the memory of popular idioms, certainly not in academic circles, so don't take them into account.

24-Ruby III
(To:-MFra-)

This is tough! Intrigue and not tell until the end

24-Ruby III
(To:ValeryOchkov)

Two different center of coordinate (Figure 7.10):

23-Emerald II
(To:ValeryOchkov)

I wonder if you have some commercial opportunity here, Valery?  Perhaps suitably amending the welt profile could alter the trajectory of the spray outwards?

Then offer to sell the concept to a shoe-polish manufacturer! 😈

Cheers,

Stuart

(Does the spray arise from the upward movement of the foot?)

24-Ruby III
(To:StuartBruff)

>

Announcements