Calculate the angular acceleration of the cylinder.?

M, a solid cylinder (M=2.03 kg, R=0.125 m) pivots on a thin, fixed, frictionless bearing. A string wrapped around the cylinder pulls downward with a force F which equals the weight of a 0.650 kg m, i.e., F=6.376 N. Calculate the angular acceleration of the cylinder (in rad/s^2).