The kinetic energy of the flywheel after 10 seconds from start is

Question

The flywheel of a steam engine has a radius of gyration of 1m and mass 2000kg. the starting torque of the engine is 2000N-m. The kinetic energy of the flywheel after 10 seconds from start is           

         (a) 75 kN – m             (b) 100kN-m

         (c) 125 kN-m             (d) 150 kN-m