A cord of negligible mass is wound round the rim of a flywheel of mass `20 kg` and radius `20 cm`. A steady pull of `25 N` is applied on the cord as shown in Fig. The flywheel is mounted on a horizontal axle with frictionless bearings.

(a) Compute the angular acceleration of the wheel.
(b) Find the work done by the pull, when `2 m` of the cord is unwound.
(c) Find also the kinetic energy of the wheel at this point. Assume that the wheel stars from rest.
(d) Compare answers to parts (b)and (c).