eprintid: 497 rev_number: 11 eprint_status: archive userid: 7 dir: disk0/00/00/04/97 datestamp: 2011-12-20 14:03:09 lastmod: 2015-05-29 20:06:56 status_changed: 2011-12-20 14:03:08 type: report metadata_visibility: show item_issues_count: 0 creators_name: Chen, W. creators_name: Cor, B. creators_name: Konuralp, A. creators_name: Reis, T. creators_name: Sengul, S. title: Spinning Soccer Ball Trajectory ispublished: pub subjects: sports studygroups: ea-sgi1 full_text_status: public abstract: As can be remembered from the recent World Cup, uncertainties in the trajectory of a soccer ball at high speeds have led to some criticism on the ball manufacturers. The existing ball trajectory models assume that as the ball spins, a layer of air, say a boundary layer, follows the motion of the ball, thus spins with it. This, in turn, induces a velocity difference on the sides normal to ball's trajectory. The velocity difference then leads to pressure difference due to Bernoulli's principle. If ω represents the axis of spin and date: 2010 citation: Chen, W. and Cor, B. and Konuralp, A. and Reis, T. and Sengul, S. (2010) Spinning Soccer Ball Trajectory. [Study Group Report] document_url: http://miis.maths.ox.ac.uk/miis/497/1/soccerballson.pdf