Ellipse: Segment to show Kepler's 2nd law

gmaths shared this idea 12 years ago
Answered

Hello Markus,


For a long time (see my suggestion in the late german forum:

http://www.geogebra.at/foru...)

I was hoping to visualize the segments in Kepler's 2nd law using GeoGebra:


"A line joining a planet and the sun sweeps out equal areas during equal intervals of time."


I suggested to use the command "sector[]" and add an optional parameter giving one of the focal points as vertex of the segment.


But now with the new version (3.0 RC2) I cannot yet find it :-(


Please, do consider it! I (and very likely many more physics teachers) would appreciate it very much.


Gisbert

Comments (5)

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1

Hello Markus,

I wonder if this issue is still on your wish list?


(17. Aug 2005, 08:36)

Ja, stimmt. Steht auch schon auf meiner Wunschliste (die allerdings derzeit recht lang ist ...)


Viele Grüße,

Markus

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1

Any idea how this could be accomplised?

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1

hello

sorry, i have deleted my last post because i had a great error (speed is not k/r, only for circles and spiral trajects)

i have made another model more accurate, i think so, but i have more imagination than knowledges.

the essential idea of my work is the calculus of speed (named vel) of the D point (D is a star ) the rest is auxiliar.

comments are welcome

saludos

https://ggbm.at/554519

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Hi

This file was on the old geogebrawiki but the link is now incorrect for download

ffa96673ca103f54cc1e904d8ce311a2

http://dmentrard.free.fr/GE...

Daniel

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1

Hi

This file was on the old geogebrawiki but the link is now incorrect for download

[attachment=0]Kepler2.jpg[/attachment]

http://dmentrard.free.fr/GE...

Daniel

hello

i can open the link correctly with win7+firefox

the different is that your M point has constant speed

saludos

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