A flywheel is made from a circular metal disc of mass 50 kg and radius 0.3 m, with a rotation axle through the centre perpendicular to the disc plane. When the flywheel is rotating at a rate of 2000 revolutions per minute, calculate the angular momentum and the kinetic energy in Sl units. (You may assume that the moment of inertia of a uniform circular disk of mass M and radius R is given by I = MR/2).