A thin, uniform rod of mass \(M\) and length \(L\) is placed on a horizontal, frictionless table. One end of the rod is attached to a fixed vertical pivot. A student applies a constant horizontal force of magnitude \(F\) to the other end of the rod at an angle \(\phi\) relative to the rod's length, as shown in the top-down view. Which of the following is a correct expression for the magnitude of the rod's initial angular acceleration \(\alpha\)?