In a previous investigation, a student produced a straight-line graph of rotational kinetic energy versus the square of angular speed for an unknown flywheel. The best-fit line had a slope of 0.018J/(rad/s)2.
a. When the flywheel is later spinning at 60rad/s, calculate its rotational kinetic energy.
b. Starting from 60rad/s, the flywheel is brought uniformly to rest in 8.0s by a constant friction torque. Determine the magnitude of this torque.