What torque would have to be applied to a rod with a length of #5 # and a mass of #5 kg# to change its horizontal spin by a frequency of #3 Hz# over #4 s#?
1 Answer
Dec 25, 2016
The torque is
Explanation:
The torque is the rate of change of angular momentum
The moment of inertia (spinning around the middle of the rod) is
The rate of change of angular velocity is
So the torque is