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.
Assassination crisis. The Archduke Franz Ferdinand of Austria, nephew of the aged emperor and heir to the throne, was assassinated in the streets of Sarajevo, the Bosnian capital, yesterday afternoon. His wife, the Duchess of Hohenberg, was killed by the same assassin.