[size=150]The numerical approach to the derivation of Kepler’s law from Newton’s laws (of motion and gravity) was introduced in the book [i]Feynman’s Lectures on Physics[/i] (three volume book, which was first published in 1963).[br][br]This method consists of the gradual numerical computation of coordinates of a planet moving in the gravitational field of the Earth, entering them in the table and their subsequent graphical representation.[br] [br]GeoGebra has been proved as the ideal environment for the implementation of this method due to the combination of numerical calculations, tables and graphical view required.[br][br]A contribution on this topic was presented at the [url=https://wiki.geogebra.org/en/GeoGebra_Conference_2011]GeoGebra Conference 2011[/url] in Hagenberg. [br][br]A corresponding paper Hašek, R. [url=http://www.geogebrajournal.com/index.php/ggbj/article/view/12/15]Numerical analysis of a planar motion: GeoGebra as a tool of investigation[/url], was published in the [url=http://www.geogebrajournal.com/index.php/ggbj/index]North American GeoGebra Journal[/url], Vol 1, No 1 (2012).[/size]