An engine, connected with a flywheel, is designed to operate at an average angular speed of 1500 rpm. During operation of the engine, the maximum change in kinetic energy in a cycle is found to be 7500 J. In order to keep the fluctuation of the angular speed within ±1% of its average value, the moment of inertia (in kg-m2) of the flywheel should be __________.
1
15.19
2
2
3
3
4
4