where a c {\displaystyle a_{c}} is the centripetal acceleration. The direction of the force is toward the center of the circle in which the object is moving, or the osculating circle (the circle that best fits the local path of the object, if the path is not circular).
The assassination of Archduke Franz Ferdinand of Austria, heir presumptive to the Austro-Hungarian throne, and his wife Sophie, Duchess of Hohenberg, occurred on 28 June 1914 in Sarajevo when they were shot dead by Gavrilo Princip.
The Archduke Franz Ferdinand and his wife were killed in Sarajevo on Sunday, 28 June 1914, at approximately 10:45 am. The assassination of Franz Ferdinand was planned and executed by a secret Serbian military society called The Black Hand. They were both shot by a 19 year old Bosnian-Serb called Gavrilo Princip.