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 Franz Ferdinand observed military maneuvers in Sarajevo; he was accompanied by local security. Failed Attempt (01:30) Assassins attack Archduke Ferdinand's convoy with bombs; Ferdinand escapes. Archduke Ferdinand Assassinated (02:22) After his initial attempt failed, Gavrilo Princip went for food. Ferdinand decided to visit the injured and Princip unexpectedly found an opportunity; he shot and killed Ferdinand. Aftermath of Shooting (01:19) Police apprehended all Ferdinand's assassins except MehmedbaÅ¡ic.