The rate of rotation of a solid disk with a radius of #3 m# and mass of #4 kg# constantly changes from #2 Hz# to #5 Hz# over #8 s#. What torque would was applied to the disk at #2 s#?
1 Answer
Feb 13, 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 initial angular velocity is
The final angular velocity is
The time is
The angular acceleration is
So,
The torque is