A roller of (total) mass 2.3 kg consists of two disks of radius 0.43 m joined via an axle of radius 0.18 m ,
shown in side view. The moment of inertia of the roller is 0.315kg*m^(2). A light string is wrapped
around the axle, and a tangential force vec(F) of magnitude 13.3 N is applied to the free end of the string
as shown, causing the roller to roll without slipping.
a\alpha =,ra(d)/(s^(2))
bf_(s)=,N