Apassenger bus in zurich, switzerland, derived its motive power from the energy stored in a large flywheel. the wheel was brought up to speed periodically, when the bus stopped at a station, by an electric motor, which could then be attached to the electric power lines. the flywheel was a solid cylinder with mass 1000 kg and diameter 1.80 m; its top angular speed was 3000 rev/min. part a at this angular speed, what is the kinetic energy of the flywheel? (express your answer in the following form: if your response is 6 \times 10^7 j6×10 7 j, then write "6e7 j").