Description:
Seven questions about free fall are introduced here. In order to develop them short experiences, experiments carried out with a movement sensor, and others analyzed with applets are showed. These developments have been extracted from a teaching-learning proposal in 1st year “Bachillerato”. This proposal wants to contribute to students’ solid learning of Newtonian mechanics. 4 students carried out these demonstrations in Science on Stage 2010 contest and where awarded by the jury.