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 was killed by a group called the Black Hand by a man called Gavrilo Princip, due to the fact that the Serbians wanted freedom and independence which they didn t get, which made the Serbians want revenge, forming the terrorist group, The Black Hand and successfully killing Franz Ferdinand and his 6 month pregnant wife, Sophie.