A wheel is rotating freely at angular speed 800 rotations per minute (rpm) on an axle which has negligible mass. A second wheel, initially at rest and with twice the moment of inerta of the first is suddenly coupled to the axle. What fraction of the original rotational kinetic energy is lost? Note:fraction is (original energy - final energy)/(original energy). a) 1/9 b) 1/2 c) 2/3 d) 1/6 e) 1/3

A wheel is rotating freely at angular speed 800 rotations per minute (rpm) on an axle which has negligible mass. A second wheel, initially at rest and with twice the moment of inerta of the first is suddenly coupled to the axle. What fraction of the original rotational kinetic energy is lost? Note:fraction is (original energy - final energy)/(original energy). a) 1/9 b) 1/2 c) 2/3 d) 1/6 e) 1/3