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.
Weâre talking the assassination of Archduke Franz Ferdinand, of courseâthe murder that set the crumbling Austro-Hungarian Empire on a collision course with Serbia, and Europe down the slippery slope that led to the outbreak of the First World War a month after Princip pulled the trigger on June 28, 1914.