@ARTICLE {, title = {Krátke zamyslenie nad úlohou: pád loptičky z výšky desať metrov}, author = {Hrkota, Klement}, journal = {Obzory matematiky, fyziky a informatiky}, year = {2008}, volume = {37}, number = {2}, pages = {68--70}, issn = {1335-4981}, abstract = {A short reflection on the task: The fall of the tennis ball from the height of 10 metres Were the students while studying the fall of the table tennis ball from the height of 10 meters condemned in advance to the failure?}, }