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.
Archduke Ferdinand Biography. Whatever else he may have done in life, Archduke Franz Ferdinand is known now as the man whose assassination touched off World War I. The nephew of the Hapsburg emperor Franz Josef, Ferdinand was first in line to the Austro-Hungarian throne when he visited Sarajevo in June of 1914.