Physics education research, electronic materials, and the musings of Christopher Moore, Ph.D.

Is frictional torque the same as regular torque? And I do not understand how to find the force of the motor, to use to find the work done by it
An old phonograph turntable is a uniform disk of mass 1.40 kg and of radius 15.0 cm.  When the phonograph is operating, the turntable spins at 33.3 rpm.  When the phonograph is turned off, the turntable coasts to a stop in 45 s.
   
a.    Find the constant frictional torque, in N•m, that acts on the
    turntable.

b.    Find the power, in W, that the motor in the phonograph must supply to
        maintain the spin of the turntable at 33.3 rpm.