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.
On Biography.com, find out how Archduke Franz Ferdinand was trying to shore up the disintegrating Austro-Hungarian Empire when he was assassinated prior to World War I. Franz Ferdinand's assassination on June 28, 1914, at the hand of a Serbian terrorist group the Black Hand, led to the beginning of World War I.