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.
Gavrilo Princip (1895-1918) was a Serbian nationalist who became the catalyst for World War I when he assassinated Austrian Archduke Franz Ferdinand in Sarajevo on June 28, 1914. member of a complicated plot against the Austrian heir to the throne, Princip seized his opportunity when a wrong turn forced Ferdinand's car to stall right in front of him. Princip then shot the Archduke and his wife, Sophie, killing them both.