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 #17 Hz#. If the change in rotational frequency occurs over #3 s#, what torque was applied to the disk?
1 Answer
May 13, 2017
The torque was
Explanation:
The torque is the rate of change of angular momentum
where
For a solid disc,
So,
The rate of change of angular velocity is
So the torque is