Need physics help with the Impact of a particle on a rod

The figure below shows a thin, uniform bar of length D = 1.31 m and mass M = 0.91 kg pivoted at the top. The rod, which is initially at rest, is struck by a particle whose mass is m = 0.30 kg at a point x = 0.80d below the pivot. Assume that the particle sticks to the rod. If the maximum angle between the rod and the vertical following the collision is 60, find the speed of the particle before impact__________________ m/s