The rate of rotation of a solid disk with a radius of #4 m# and mass of #2 kg# constantly changes from #5 Hz# to #1 Hz#. If the change in rotational frequency occurs over #3 s#, what torque was applied to the disk?
1 Answer
Jan 24, 2018
The torque is
Explanation:
The torque is the rate of change of angular momentum
where
The mass of the disc is
The radius of the disc is
For a solid disc,
So,
The rate of change of angular velocity is
So,
The torque is