What torque would have to be applied to a rod with a length of #7 m# and a mass of #9 kg# to change its horizontal spin by a frequency #9 Hz# over #16 s#?
1 Answer
Jan 2, 2017
The torque is
Explanation:
The torque is the rate of change of angular momentum
The moment of inertia of a rod is
The rate of change of angular velocity is
So the torque is