The rate of rotation of a solid disk with a radius of #8 m# and mass of #5 kg# constantly changes from #2 Hz# to #12 Hz#. If the change in rotational frequency occurs over #5 s#, what torque was applied to the disk?
1 Answer
Jan 18, 2017
The torque was
Explanation:
The torque is the rate of change of angular momentum
The moment of inertia of the disc is
The rate of change of angular velocity is
So the torque is