The rate of rotation of a solid disk with a radius of #1 m# and mass of #5 kg# constantly changes from #6 Hz# to #24 Hz#. If the change in rotational frequency occurs over #6 s#, what torque was applied to the disk?
1 Answer
Oct 4, 2017
The torque was
Explanation:
The torque is the rate of change of angular momentum
where
For a solid disc,
The mass of the dics is
The radius of the disc is
So, the moment of inertia is
The rate of change of the angular velocity is
So,
The torque is