https://www.houspain.com/en_gttp/ 2026-05-25T17:37:11+02:00 https://www.houspain.com/en_gttp/ https://www.houspain.com/en_gttp/lib/images/favicon.ico text/html 2013-07-09T14:44:28+02:00 https://www.houspain.com/en_gttp/doku.php?id=movimientos_propios:como_fijar_referencias_cuando_todo_se_mueve&rev=1373373868&do=diff *educational content may be downloaded at the bottom of this page. Educational problem Students are taught about and familiarized with simple reference systems as those drawn on the black board. However setting a reference system is not trivial and it is closely related with the concept of relative motion and inertial reference systems. Textbook teaching of the subject is limited due to the lack of accessible and inspiring experiments. Students are familiarized with GPS devices but t…