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.
Life until 1914. 1  Franz Ferdinand was the eldest son of the archduke Charles Louis, who was the brother of the emperor Franz Joseph. The death of the heir apparent, the archduke Rudolf, in 1889, made Franz Ferdinand next in succession to the Austro-Hungarian throne after his father, who died in 1896.